Clinical and Scientific Advisory Board
Charlotte Höybye
Chair
Senior Consultant and Associate Professor, at the Department of Endocrinology, Metabolism and Diabetology, Karolinska University Hospital, Stockholm, Sweden.
Moris A. Angulo
Director of Medical Genetics. Assistant Director of Pediatric Endocrinolgy, Winthrop University Hospital, Mineola, NY USA.
Susanne Blichfeldt
Consultant (Neuropediatrics). Susanne has an adult son with PWS. She is also a member of the IPWSO Famcare Board.
Leopold Curfs
Dept. of Clinical Genetics, University Maastricht/Academic Hospital, Maastricht, The Netherlands.
Dan Driscoll
Dan Driscoll, MD, PhD is a Professor of Pediatrics and the John T. & Winifred M. Hayward Professor of Genetics Research at the University of Florida College of Medicine. Dan received his MD from Albany Medical College, his PhD (Medical Genetics) from Indiana University School of Medicine, and did his Pediatric residency and Medical Genetics fellowship at the Johns Hopkins Hospital. He is board certified in Pediatrics and Medical Genetics & Genomics. He has been conducting research on the Prader-Willi syndrome and early childhood obesity for the last 35 years. Due to his research contributions, he was elected to the Society of Scholars from the Johns Hopkins University in 2006.
Marilyn Dumont-Driscoll
Marilyn has a faculty practice with patients who have childhood obesity, PWS, sleep disorders or learning disabilities. A founding member of the Academic Pediatric Association’s Continuity Clinic Research Network, the HRSA-funded Genetics Initiative in Primary Care Education Advisory Committee, the APA representative to the March of Dimes Genetics in Practice Initiative, the NIH Secretary’s Advisory Committee on Genetic Testing Panel and the Pediatric Academic Societies Executive Committee. Marilyn was an IPWSO Trustee from 2016-2022.
Nick Finer
Nick lives in the UK and is a former honorary professor of clinical medicine at University College London. Nick trained as a clinical academic endocrinologist and over 3 decades developed multidisciplinary obesity services at Guy’s, Luton, Cambridge, and University College London hospitals. From 2016-2022, Nick was Senior Principal Clinical Scientist, Global Medical Affairs, with Novo Nordisk in Denmark. His research on obesity and its related complications, is represented by 200 peer-reviewed papers and reviews, and more than 23 book chapters.
Janice L. Forster
Child and Adolescent Psychiatrist, Pittsburgh Partnership, Pittsburgh, PA USA.
Anthony Holland
Tony Holland trained in Medicine at University College and University College Hospital, London, qualifying in 1973. After some years in General Medicine, he trained in Psychiatry at the Maudsley Hospital and Institute of Psychiatry in London. From 1992 to 2002 he held a University Lecturer’s post in the Section of Developmental Psychiatry in the University of Cambridge, and in 2002 was awarded the Health Foundation Chair in Learning (Intellectual) Disability establishing the Cambridge Intellectual and Developmental Disabilities Research Group (www.CIDDRG.org.uk). His specific research interests include the eating, behavioural and mental health problems associated with having Prader-Willi syndrome (PWS). With colleagues he has published research extensively on these topics in academic and practice-based journals. He is Patron of the UK PWS Association and from 2016-2025 was President of IPWSO. Since October 2015 he has held an Emeritus position at the University of Cambridge.
Constanze Lämmer
Constanze is qualified in pediatric endocrinology, diabetology, nutrition, somnology and epileptology. She established the Hildesheim program for treating patients with PWS and currently works as Senior Physician, KJF Klinik Josefinum, Children’s Hospital, Pediatric Endocrinology and Diabetology, Augsburg, Germany.
Akhil Maheshwari
Akhil Maheshwari, MD, is an established, widely-recognized neonatologist who grew up in India and then relocated to Florida for further training in clinical pediatrics, neonatology, and laboratory research. He has served in faculty and departmental leadership positions at several universities in the United States. His research contributions in gut/systemic inflammation and macrophage biology in neonates and related educational efforts have been acknowledged. In addition to his efforts to increase public awareness for newborn health issues, he has developed the Global Newborn Society, a world-wide public-health organization; and its journal, The Newborn. He has also helped develop several healthcare programs in India, Mongolia, Bangladesh, the USA, and Norway. He is currently serving as a member of the Boston Children’s Physicians Group.
Shawn E. McCandless
Shawn E. McCandless, MD, is Professor of Pediatrics, and the Section Head for Genetics and Metabolism at the University of Colorado Anschutz Medical Campus and Children’s Hospital Colorado. He is past President of the Society for Inherited Metabolic Disorders (SIMD). His research has focused on inborn errors of metabolism (IEM) and Prader-Willi syndrome (PWS), including publicly and industry funded clinical trials for children and adults with IEMs and PWS. After training with Dr. Suzanne Cassidy, he has been the Medical Director of PWS multi-disciplinary clinics in North Carolina, Ohio, and now in Colorado. He is board certified in Pediatrics (1992), Clinical Genetics (1999), and Clinical Biochemical Genetics (2005). He is a fellow of the American Academy of Pediatrics and of the American College of Medical Genetics, and he serves on the Board of Directors of the SIMD.
Jennifer Miller
Jennifer Miller is a Professor of Pediatric Endocrinology at the University of Florida. Dr. Miller graduated with her M.S. in Chemistry from Emory University in 1994, her M.D. from the University of Florida in 1998, and her M.S. in Clinical Investigation from the University of Florida in 2005. Dr. Miller has worked with individuals with Prader-Willi syndrome and other types of hypothalamic dysfunction for over 20 years and has spent her career working to understand the etiology of hyperphagia and find possible treatments for individuals with a variety of hypothalamic abnormalities. Dr. Miller’s research efforts are focused on developing clinical treatment trials for individuals of all ages with hypothalamic obesity and hyperphagia.
Ann Scheimann
Maithé Tauber
Professor of Pediatrics, University of Toulouse. She directs the Reference Centre for Prader-Willi syndrome in France and is the Chair of the Scientific Council of Prader-Willi France. Her research includes oxytocin in PWS.
Li-Ping Tsai
Head, Department of Pediatrics, Taipei Tzu Chi Hospital, Taiwan.
Harold van Bosse
Orthopaedic Surgeon. Harold is also on the board of directors for Arthrogryposis Multiplex Congenita Support, Inc. and A Leg to Stand On, he is a member of the PWSA (USA) Clinical Advisory board. He is also an associate professor of orthopaedics at Temple University.
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International Community
IPWSO was established so that PWS associations, families, clinicians and caregivers around the world could exchange information and support and have a united global voice under one umbrella.
Information for
Families
Find useful guides, research and information to help families manage PWS.
Information for Medical Professionals
The latest medical and scientific research and information, plus guides into common medical issues affecting people with PWS.
Information for
Professional Caregivers
Sharing international knowledge among professional service providers throughout the world.
Paediatric Association of Nigeria - 57th Annual Scientific Conference
IPWSO was proud to support a dedicated PWS symposium at the 57th Annual Scientific Conference of the Paediatric Association of Nigeria (PAN) Conference held 21-23 January 2026 in Ogun State.
Famcare Board Member, Dr Elizabeth Oyenusi, presented on the clinical features, diagnosis, and management of PWS, while Dr Oluwakemi Ashubu shared the first genetically confirmed case of PWS in the country - an important milestone. The session attracted over 104 delegates and sparked a lively discussion.
IPWSO also hosted an exhbition table throughout the 3-day conference, distributing educational materials and engaging directly with healthcare professionals.
We are hugely grateful to Dr Oyenusi, Dr Ashubu and Dr Oladipo (Senior Registrar) for their support in making this educational oureach possible - helping to strengthen awareness and improve early diagnosis of PWS in Nigeria. Funding for this event was kindly provided by Friends of IPWSO (USA).
Global Newborn Society Inaugural Conference, Sweden
The Global Newborn Society’s 1st Conference took place in Uppsala and Stockholm, Sweden, from 2-4 November 2025, marking an exciting milestone for the organisation’s international community.
We were delighted that Dr Susanne Blichfeldt was invited to deliver a plenary lecture on behalf of IPWSO, titled “Neonatal Hypotonia: Clinical Features Seen in PWS That Can Help Differentiate It from Other Congenital Disorders with Similar Symptoms.”
The inaugural event brought together a diverse audience of physicians, nurses, and social care leaders from around the world. The programme was wide-ranging and stimulating, featuring cutting-edge discussions on newborn health, early diagnosis, and innovative care practices - setting a strong foundation for future collaboration within this growing global network.
ASPED 2025, Dubai, UAE
The 6th conference of the Arab Society for Paediatric Endocrinology and Diabetes was held in Dubai over two days on the 26th and 27th September 2025. IPWSO was invited to be a partner and to present at a session on PWS. The conference was attended by over 400 paediatric endocrinologists from more than 20 countries in the Middle East and North Africa. Charlotte Hoybye and Tony Holland attended and presented on behalf of IPWSO and Dr Sarah Ehtisham described her experience seeing patients with PWS in the United Arab Emirates. IPWSO hosted a stand for the whole conference.
In conversation many attendees reported seeing people with PWS and described the challenges they faced, particularly with the management of behaviour problems. Some felt nervous about starting growth hormone as they had had no experience prescribing it to infants with PWS.
Approximately 100 attendees joined the IPWSO mailing list and attendees were very keen to gain knowledge about PWS. Numerous memory sticks with information on PWS and printed material in English and Arabic were taken. Some attendees talked about establishing national or regional PWS Associations.
This was an extremely positive experience and hopefully attending this meeting has laid the groundwork for IPWSO to engage more fully in the Region in the future. We were very well looked after, and the organisers were excellent hosts.
EPNS 2025, Munich, Germany
Together with parents and representatives from the Prader-Willi-Syndrom Vereinigung Deutschland, we were proud to host a PWS exhibition stand at the 16th Congress of the European Paediatric Neurology Society, held in Munich from 8-14 July 2025. The event welcomed over 2,000 medical professionals from around the world.
We had the pleasure of engaging with attendees from Türkiye, Iraq, Palestine, Croatia, Moldova, the Philippines, Ukraine, North Macedonia, Kazakhstan, Armenia, and many local specialists.
Dr. Stefani Didt, Gesellschafter at Katholische Jugendfürsorge der Diözese Augsburg, kindly supported us at the stand and provided expert responses to clinical enquiries. We hope these international connections will contribute to raising awareness about IPWSO’s work, particularly in improving access to genetic testing in underserved regions.
We also highlighted the new treatment for hyperphagia and shared our recent publication, "Improving Mental Health and Well-being for People with PWS."
Sincere thanks to our colleagues from PWS Vereinigung Deutschland and to Dr. Didt for their invaluable support.
ESPE-ESE 2025, Copenhagen, Denmark
IPWSO was honoured to participate in the recent Joint Congress of the European Society for Paediatric Endocrinology (ESPE) and the European Society of Endocrinology (ESE), held in Copenhagen from 10–13 May 2025. This important event provided an invaluable opportunity to raise awareness of Prader-Willi syndrome (PWS) among a broad international medical audience.
IPWSO was represented by our CEO, Margaret Walker, along with Dr Charlotte Höybye from Sweden and Dr. Susanne Blichfeldt from Denmark—both esteemed members of IPWSO’s Clinical and Scientific Advisory Board.
Dr Blichfeldt noted that this congress is a major event in the clinical academic calendar and has a particular significance as it marks the first-ever joint meeting of these two prominent societies. Despite its European designation, the congress attracted participants from around the globe, including delegates from the Middle East, Africa, the United States, Japan, Australia, and New Zealand.
IPWSO’s educational booth was strategically positioned within the Patient Advisory Group area dedicated to rare disease organisations. As part of the programme, we were invited to deliver a 30-minute presentation during the Patient Voices Session. Dr Charlotte Höybye and Dr Susanne Blichfeldt presented on Prader-Willi syndrome (PWS), with a focus on genetics, endocrinology, and clinical manifestations. Our presentation, along with many others, was recorded and is now available on demand via the ESPE-ESE congress platform.
PWS was prominently featured throughout the congress. In a session on the transition of care for patients with rare diseases, Dr. Maithé Tauber (Toulouse, France) discussed the specific challenges associated with the transition period in PWS. She emphasized the need for multidisciplinary care and ongoing specialist follow-up in adulthood through dedicated PWS clinics.
Another session addressed medical and clinical management in both children and adults with PWS, again highlighting the critical importance of a smooth transition from paediatric to adult care and the role of specialised clinics. The session included an in-depth discussion on hyperphagia in PWS, exploring its profound impact on individuals and their families. Management strategies were reviewed, and a new medication, Vykat, was presented as a potential treatment for hyperphagia.
In addition, there was a strong presence of scientific posters on PWS from various countries, covering a wide range of topics such as hormonal therapies, genetic findings, ageing, and guidance for families. A total of 33 posters focused on PWS, reflecting a growing global interest and commitment to advancing knowledge and care in this area.
We were greatly encouraged by the high level of engagement and the visibility given to PWS throughout the congress. This increased awareness brings hope that more children will be diagnosed earlier and receive appropriate, specialised medical care from childhood through to adulthood.
ASPAE 2025, Abidjan, Côte d’Ivoire
After Yaounde (Cameroon 2023) and Alger (Algeria 2024), IPWSO was pleased to be present at the 16th Annual Congress of the African Society of Paediatric and Adolescent Endocrinology (ASPAE), at the invitation of Dr Kouamé Hervé Miconda, Programme Co-organiser. Prior to the main conference, IPWSO, in partnership with Dr Micondo, organised a dedicated PWS workshop which attracted 60 professionals - paediatricians, endocrinologists, doctors, students, nurses, and midwives.
MENA 2025 Abu Dhabi, UAE
The Middle East and North African (MENA) conference for Rare Diseases was held in Abu Dhabi, United Arab Emirates, between 17th and 20th April 2025. Tony Holland represented IPWSO at this meeting and presented a poster about our work. The conference was attended by clinicians, genetic councillors, scientists, and other health disciplines from across North Africa and the Middle East. The conference was in English as many clinicians in this part of the world are from elsewhere and not Arabic speakers. The conference was of a very high standard and ranged broadly across many rare genetically determined conditions as well as there also being discussions about how to develop services and how to seek approval for new treatments. Our poster was one of five that was selected as the best posters exhibited at the meeting. Tony said, "My experience of the conference was very positive and I am sure there are opportunities that can be built on. Being part of the endocrinology meeting, which is likely to be attended by endocrinologists from across the whole region, provides a wonderful opportunity to engage more fully with clinicians most likely to see people with PWS".
Kenya Paediatric Association Annual Scientific Conference, Monbassa, Kenya
Dr Menbere Kahssay and Dr Renson Mukhwana, Aga Khan University Hospital, Nairobi represented the Kenyan team and, together with Drs Constanze Laemmer and Dr Charlotte Höybye, managed the IPWSO educational booth at our first meeting in this region.
A dedicated session on PWS significantly raised awareness and knowledge about the syndrome among paediatricians and allied health professionals.
Dr Kahssay said, "We were able to have track and plenary session and four days interaction with the participants at the booth.
The PWS session focused on case experiences and regional differences in PWS management. Thanks to IPWSO’s support, Drs Charlotte Hoybye and Constanze Lammer joined as expert speakers, sharing their valuable experiences in managing PWS across the neonatal, childhood, and adult stages".
Dr Menbere Kahssay and Dr Renson Mukhwana presented genetically confirmed local cases, highlighting diagnostic challenges and treatment approaches.
Third Biennial Rare Diseases Conference, Rare X, Johannesburg, South Africa
Karin Clarke and Molelekeng Sethuntsa organised the IPWSO exhibition table at this event in Johannesburg from 14-17 February 2024. Molelekeng attended the conference and reported on the excellent discussions that focused on the challenges of early diagnosis, especially in Africa, centres of excellence, and ways that the Department of Health, WHO and RDI can improve detection and treatment of rare diseases.
6th RARE Summit 2023, Cambridge, UK
Tony Holland, President, and Agnes Hoctor, Communications and Membership Manager, represented IPWSO at the 6th RARE Summit organised by Cambridge Rare Disease Network on 12 October, 2023.
MetaECHO® 2023, Global Conference, Albuquerque, New Mexico
The 5th MetaECHO® Global Conference took place from September 18-21 in Albuquerque, New Mexico. It celebrated 20 years of ECHO programmes and brought together ECHO leaders, partner teams, government officials, funders, policy makers, and industry experts to share retrospective work and thoughts on the future of ECHO. Our President, Tony Holland, presented a paper on “A Global ECHO Programme for the Rare Disorder – PWS", based on IPWSO’s Project ECHO programme.
EPNS 2023, Prague, Czech Republic
The 15th European Paediatric Neurology Society Congress (EPNS) took place from 20-24 June. Tünde Liplin, PWS Hungary, and Hana Verichová, PWS Czechia, represented IPWSO. Twenty-two people from countries including Georgia, Israel, Lithuania, Turkey, Italy, Slovakia, Romania, Netherlands, Bosnia Herzegovina, Belgium, Argentina, Norway, Serbia, India, and Australia subscribed to the "Stay in touch with IPWSO!" contact list. Tünde reported that many people came to the stand just to inquire and chat, the majority of whom were hearing about IPWSO and our work for the first time.
ECE 2023, Istanbul, Turkey
The European Congress of Endocrinology (ECE) took place from 13-16 May. We hosted an information table and were represented by IPWSO advisers, Constanze Lämmer and Charlotte Höybye, and also our Communications and Membership Manager, Agnes Hoctor. We were pleased to be given the opportunity to present on IPWSO and PWS at the Hub Session. The most exciting and important element for us was that the Turkish location meant that delegates came from many countries in Middle East as well as Europe.
ASPAE 2023, Yaoundé, Cameroon
We hosted an educational booth and presented at the round table on Obesity at this important Endocrinology conference hosted by the African Society of Paediatric and Adolescent Endocrinology (ASPAE) from 9-10 February. Read our blog about our visit.
ECE 2021, Online
We hosted an educational booth and gave a presentation at the European Congress of Endocrinology in May 2021.
ESPE 2019, Vienna, Austria
We exhibited at the European Society of Paediatric Endocrinology (ESPE) Conference in Vienna, Austria, which took place in September 2019. Find out more in our blog.
ECE 2019, Lyon, France
We exhibited at the European Congress of Endocrinology in May 2019.
Dr Ashubu discussing IPWSO's educational materials with delegates at our booth.
IPWSO was honoured to be invited to present at the Global Newborn Society's Inaugural Conference.
Dr Sarah Ehtisham presenting at ASPED 2025 followed by a panel discussion.
Colleagues from PWS Vereinigung Deutschland help manage our PWS stand at EPNS 2025. Many thanks to all the parents and carers for their invaluable support!
Dr Charlotte Höybye (Sweden) and Dr. Susanne Blichfeldt (Denmark) presenting at the ESPE-ESE Patient Voices Session - May 2025
Dr Blichfeldt and Margaret Walker (CEO) managing our IPWSO educational booth.
François Besnier, IPWSO's Vice President, meeting some of our travel fellowship delegates at ASPAE 2025.
IPWSO's poster achieves top award!
Many thanks to Drs Constanze Laemmer, Menbere Kahssay, Charlotte Höybye and Renson Mukwana for all their support at KPA 2025.