IPWSO Boards


( President, 1991-1998)

Jean Phillips-Martinsson (UK) pictured with Dr Andrea Prader

Jean is the parent founder of IPWSO and has an adult son with PWS.  She divides her time between Sweden where her son lives, and the UK where she has retired.  Jean has written an introductory history of IPWSO.  In 1986, two years after her son was diagnosed at the age of 14, she co-founded the Swedish PW Association together with two other families. Jean has written the first chapters of IPWSO's history.

IPWSO Board 


Anthony J. Holland, MD, CBE (United Kingdom)

Health Foundation Chair in Learning Disabilities

Tony is a clinical and academic psychiatrist specialising in the field of intellectual disabilities. Since 2002 he has led the Cambridge Intellectual and Developmental Disabilities Research Group in the Department of Psychiatry at the University of Cambridge, UK. He has been the psychiatric advisor to PWSA UK and is now their Patron. With colleagues he has undertaken extensive research, particularly into the hyperphagia and the behavioural and mental health problems commonly associated with having PWS. His research has been published in academic and practice-based journals and he has been involved in the preparation of guidance for IPWSO and PWSA UK. He has attended all of the IPWSO International conferences and was one of the organisers for the IPWSO conference held in Cambridge in 2012. In 2015 he was awarded a CBE in the Queen's Birthday Honours List for services to psychiatry.

Marilyn Dumont-Driscoll, MD, PhD (USA)


Marilyn has a faculty practice with patients with have childhood obesity, PWS, sleep disorders or learning disabilities. A founding member of  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

Mariona Nadal (Spain)

Fundación SPW, Spain

Mariona is a senior software engineer. She has been a volunteer on her local PWS association for more than 10 years before joining IPWSO board, working on both management and activities. Mariona's younger brother was born in 1998 and diagnosed with PWS several years later. Since then, the whole family has worked with PWS,  spreading knowledge throughout Spanish speaking countries.


Marguerite Hughes (Ireland)

Marguerite is based in Ireland and has held senior voluntary and paid positions in non-profit organisations in sectors including international development, patient support and advocacy, homelessness, and educational advocacy for over 15 years.  In 2012 Marguerite graduated with a doctorate in Social Science based on her research into media reporting of legitimacy and accountability of non-governmental organisations.  Marguerite's first child was born in 2004 and diagnosed with PWS shortly after birth.


Hubert Soyer, PhD (Germany)

Psychologist and General Manager of Regens Wagner Absberg (a large residential and supported-working institution for adults with disabilities including many with PWS), Hubert has been very involved with organizing and developing the Professional Provider Caregiver Board (PPCB),

Georgina Loughnan (Australia)

Director, Famcare

Physiotherapist - Metabolism & Obesity Services
and the Prader-Willi Syndrome Clinic,
Royal Prince Alfred Hospital, Camperdown, NSW Australia

Georgina has worked with obese people with disabilities for many years and established a public hospital-based Prader-Willi syndrome clinic for adolescents and adults 25 years ago. She is an executive member of the NSW PWS Association in Australia and her expertise covers physical activity and nutrition for healthy lifestyles.

Amalia Balart (Chile)

Amalia Balart is a Teacher of English and Teacher for Special Needs.  Head of Junior Dept at The Newland School in Chile for the past 26 years and a graduate of  Master in Special Education, she has worked as Bilingual Therapist to help children with attention deficit disorder, learning disabilities and poor executive functions.  She is the mother of a 35 year old daughter with PWS.

June-Anne Gold  MD (USA)

Associate Professor in the Pediatrics Department in Clinical Genetics and Metabolic Genetics at Loma Linda University School of Medicine and HS Clinical Associate Professor in the Department of Pediatrics and Division of Genetics and Genomics at University California Irvine.  Trained in London and Oxford in Pediatrics and genetics. She relocated to the USA in 2004.

Verena Gutmann (Austria)

Educational Head of Department  responsible for the Educational Management of 100 youngsters from 14-20 years.  Also responsible for the formation of the Austrian PWS Association and  chairperson for 10 years. Verena was an auditor for IPWSO before joining the board.  She has a 26 yr old daughter with PWS living in the  Regens Wagner Instiution in Absberg /Bavaria/Germany.


James O'Brien (Australia)

Underscored by a powerful desire to maximize outcomes for all people living with PWS, James' education, management and operating experience spans national and international charities, special school settings and disability services. 

James holds numerous volunteer appointments, including:

  • Director, International Prader-Willi Syndrome Organisation

  • Council Member, RADE Global Advocacy Leadership Council, Global Genes

  • President, Prader-Willi Syndrome Australia

  • Founding Director, PWS Better Living Foundation

James’ love for his two children, including his son Ashley (26yo) living with PWS, drives his desire to establish PWS education, advocacy and support services across Australia and around the globe.

Linda Thornton (New Zealand)

Communications Coordinator

Linda founded the PWSA (New Zealand) in 1989, five years after the birth of her daughter with PWS.  She was on the inaugural IPWSO board and has since served a further term before taking up her current position.  She wrote much of the NZ publications and designed caregiver training programmes and is a Winston Churchill Scholar.  In 1999 she received a Queen's Service Medal for her work with PWS in New Zealand

Agnes Hoctor (UK)

Communication & Membership Manager

Agnes worked at Cambridge University, UK, alongside Tony Holland, and became Administrator for the 2019 IPWSO Conference in Cuba.  She has now joined IPWSO staff in the new position of Communication & Membership Manager 

Clinical & Scientific Advisory Board


Dan Driscoll, PhD, MD (USA)

University of Florida
Health Sciences Center
Div. Genetics / Dept. of Pediatrics
Gainesville, FL  U.S.A.

Maithe Tauber, MD

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

Urs Eiholzer, MD

Associated Professor and Head
PEZZ Center for Pediatric Endocrinology
Möhrlistrasse 69
CH-8006 Zürich

Charlotte Hoybye,

Senior Consultant, Associate Professor,

Department of Endocrinology, Metabolism and Diabetology, Karolinska University Hospital, Stockholm,



Susanne Blichfeldt, MD (Denmark)

Consultant (Neuropediatrics)

Susanne has an adult son with PWS.

Moris A. Angulo

Director of Medical Genetics
Assistant Director of Pediatric Endocrinolgy
Winthrop University Hospital
Mineola, NY  U.S.A.

Suzanne Cassidy, MD

Medical genetics doctor in Sausalito, California and is affiliated with UCSF Medical Center.

A founding member of IPWSO and Past President, Susie is also a serving board member of PWSA USA

Harold van Bosse

Orthopaedic Surgeon

Shriner Hospital, Boston.  Also on the board of directors for Arthrogryposis Multiplex Congenita Support, Inc. and A Leg to Stand On, he  a member of the PWSA (USA) Clinical Advisory board. He is also an associate professor of orthopaedics at Temple University.

Prof. Dr Leopold Curfs, PhD

Dept. of Clinical Genetics
University Maastricht/Academic Hospital
Maastricht, The Netherlands

Janice L. Forster, MD

Child & Adolescent Psychiatrist
Pittsburgh Partnership
Pittsburgh, PA  U.S.A.

Ann O. Scheimann MD, MBA

Assistant Professor of Pediatrics
Johns Hopkins School of Medicine

Baltimore, USA

Professional Provider & Caregiver Board


Norbert Hodebeck-Stuntebeck, PhD


Diakonische Stifung



Jackie Mallow

Executive Program Consultant

Root Connections Consultative Services LLC

Oconomowoc, WI, USA

Fanny Cortes MD

Clinical Geneticist Rare Diseases Center. Clinica Las Condes Santiago,



Mary K Ziccardi

Regional Director




Larry Genstil, PhD


Executive Director

Genstil Institute of Human Behaviour


Lisa Boman


Counselor & social worker

PWS Group Home






Hubert Soyer PhD


Director, Regens Wagner



John Ford


Specialising in behavioural care

New Zealand

Michael Pethe
 Leader of the PWS group home, Surava, Switzerland

Douglas House, 18b Trumpington Road, Cambridge


Phone: +44.1223465216

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