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Medical & Scientific Advisory Board

The Global DARE Foundation is fortunate to have an advisory board made up of the foremost researchers and clinicians in the field of Refsum Disease, peroxisomal disorders and Retinitis Pigmentosa. In their roles as medical and scientific advisers, members collaborate with each other and with our Board of Directors to drive forward better quality of life for those diagnosed with Refsum Disease. 

Focused Medical & Scientific objectives will ensure success

Treatment & Care

  • Develop, publish and maintain treatment guidelines for the care of Refsum patients

  • Yearly updates to the diet and nutrition guidelines

  • Publish guidelines on how to best eat and exercise to minimize fat burning

  • Participate in the educational activities of DARE including assistance with content on the website and other outreach opportunities


  • Provide advice and recommendations to the DARE Board on short-term and long-term planning for better therapeutic approaches and a potential cure for Refsum


  • Assist the DARE board in the review of scientific proposals for support and funding

  • Collaborate in establishing a patient registry and Natural History Study for Refsum

  • Recommend research on nutrition, diet and physical activity (e.g phytanic acid in food, exercise, fat mobilization)


  • Advocate within the research and medical field for focused work on areas that may improve the quality of life of patients diagnosed with Refsum.

  • Assist DARE in interactions and connections with sponsors and industry.

  • Help plan, promote, and generate presentations for webinars and conferences.

  • Promote and expand cooperation with other research and rare disease organizations

  • Raising awareness with the medical community to promote earlier diagnosis of Refsum Disease

Medical & Scientific Advisory Board

Joseph G. Hacia, PhD - MSAB Chair

Joseph G. Hacia is an Associate Professor of Biochemistry and Molecular Medicine and Vice Chair for Medical Education at the Keck School of Medicine of the University of Southern California (USC). He earned his Ph.D. in Biology from the California Institute of Technology in Pasadena, CA and completed his postdoctoral work in Medical Genetics at the National Institutes of Health in Bethesda, MD.

Dr. Hacia has a long-term commitment to identify therapeutic interventions for peroxisomal disorders by participating in multi-institutional research collaborations while maintaining an independent laboratory at USC. He is active on advisory boards for the United Leukodystrophy Foundation, RhizoKids International, Global Foundation for Peroxisomal Disorders, and Global DARE Foundation.

Mousumi Bose, PhD, MSAB Co-Chair

Dr. Mousumi Bose is the mother of Ilan Betzer (2010-2011), who was born with a severe form of Zellweger spectrum disorder (ZSD), a peroxisome biogenesis disorder. Through her experience with her son, Dr. Bose joined the Board of Directors for the Global Foundation for Peroxisomal Disorders (GFPD) and later joined as chair of the GFPD Scientific Advisory Board. Her work with the GFPD has resulted in the first GFPD research grant cycle as well as the first treatment guidelines for PBD-ZSD, which has shown to be an invaluable resource for families affected by ZSD. Dr. Bose is currently an assistant professor at Montclair State University in New Jersey in the Department of Nutrition and Food Studies. Her long-term goal is to combine her training in nutritional sciences with her knowledge and experience with peroxisomal disorders to help improve the quality of life for families affected by rare metabolic disorders.

Paul Watkins, MD, PhD, MSAB Co-Chair

Dr. Watkins is Professor Emeritus of Neurology at the Johns Hopkins University School of Medicine, and was director of the Lipid Enzymology Laboratory at the Kennedy Krieger Institute in Baltimore, MD for 35 years. His research focused on human genetic diseases with defects in lipid metabolism, in particular the peroxisomal diseases which include adult Refsum disease. His laboratory investigated the normal pathway of phytanic acid alpha-oxidation and characterized the early enzymatic steps required for degradation of this toxic fatty acid. The lab was instrumental in the identification of phytanoyl-CoA alpha-hydroxylase, or PHYH, as the gene responsible for Refsum disease. He has collaborated with Prof. Wanders and Dr. Hacia on several aspects of phytanic acid metabolism and Refsum disease. Although formally retired, he is actively working with Drs. Braverman and Hacia to investigate therapeutic approaches in Refsum diseases and peroxisome biogenesis disorders.

Florian Eichler, MD

Dr. Eichler is a Professor of Neurology at Massachusetts General Hospital (MGH) and Harvard Medical School. His career has been dedicated to advancing the care and treatment for devastating neurogenetic conditions. Dr. Eichler runs a laboratory at MGH that explores the relationship of mutant genes to specific biochemical defects and their contribution to neurodegeneration. In 2009 the laboratory identified two neurotoxic desoxysphingoid bases that accumulate in mutant transgenic mice and humans with HSAN1. For this work Dr. Eichler received the Wolfe Neuropathy Research Prize from the American Neurological Association. This has further led to a first clinical trial of substrate supplementation therapy for patients with HSAN1. In 2015, he became Director of the Center for Rare Neurological Diseases at MGH. The Center aims to eradicate rare disorders of the nervous system by leveraging the power of biological insights towards design and implementation of clinical trials. Dr. Eichler is the principal investigator of several NIH-funded studies on neurogenetic disorders as well as a gene therapy trial of adrenoleukodystrophy that recently reported on first successful outcomes in the New England Journal of Medicine. Dr. Eichler also serves as chair of the Rare Disease Think Tank at MGH and is founder and president of the international consortium ALD Connect, a patient powered research network that is dedicated to curing adrenoleukodystrophy.

Radha Ramachandran, MD, PhD

Following successful completion of core medical training, and membership of the Royal College of Physicians’ UK examinations, Radha Ramachandran undertook her specialist training in Chemical Pathology and Metabolic Medicine at Imperial College Healthcare NHS Trust in London. She completed her sub-speciality training in Adult Inherited Metabolic Diseases training at the National Hospital for Neurology and Neurosurgery, Queen Square and Evelina Centre of Inherited Metabolic Diseases. During her training she was awarded the prestigious NIHR Doctoral Fellowship. Her doctoral research focussed on evaluation of current and novel biomarkers for neuroendocrine disease. She was appointed Consultant in Metabolic Medicine and Adult Inherited Metabolic Diseases (IMD) at the nationally commissioned Centre for Inherited Metabolic Diseases at Guys and St Thomas’ NHS Foundation Trust (GSTT) in Feb 2013 and was appointed Clinical Lead for the service in March 2017. She has been involved in caring for patients at the world renowned Refsum’s Disease Clinic at Chelsea Westminster Hospital in London since 2014. It has the largest cohort of patients with Adult Refsum’s Disease in the UK. In March 2019, the Adult Refsum’s Disease clinic was moved to be amalgamated with the Adult IMD service led by Dr Ramachandran at GSTT.

Anthony S. Wierzbicki, PhD

Professor Anthony Wierzbicki is consultant in metabolic medicine/chemical pathology at Guy’s & St. Thomas’ Hospitals and honorary Professor in Cardiometabolic Disease at King’s College, London. He has worked in the Refsum disease clinic at the Westminster later Chelsea & Westminster Hospital and now St Thomas’ Hospital since 1994. He has published 20 papers on Refsum disease and was a member of the EU FP7 RDDPT consortium that clarified much of the clinical, biochemical and genetic features of Refsum disease. He has 300 publications, 19 book chapters and written 1 book. He helped write the International guidelines on Familial Hypercholesterolaemia (2014) and the American Heart Association scientific consensus statement on Familial Hypercholesterolemia (2015).

Sarah Firman, Clinical Dietitian

Sarah Firman graduated with a Master of Dietetics from the University of Otago, New Zealand, beginning her career as a Renal Dietitian. Since 2017, Sarah has been working as a Clinical Dietitian in the Adult Inherited Metabolic Diseases team at St Thomas’ Hospital, London, supporting patients in the dietary management of a variety of Inherited Metabolic Diseases. In March 2019 the Adult Refsum Disease Specialist Clinic at Chelsea & Westminster Hospital integrated with the Adult Inherited Metabolic Diseases service at St Thomas’ Hospital where Sarah is now involved in providing dietary support to the largest cohort of patients with Adult Refsum Disease in the United Kingdom. Sarah was awarded an HEE/NIHR Pre-Doctoral Clinical Academic Fellowship in 2019 and is currently undertaking this part-time, alongside her continued clinical role.

Ronald JA Wanders, PhD

Prof. Dr. Ronald JA Wanders is Professor Emeritus Clinical Enzymology of Metabolic Diseases at the University of Amsterdam and was Head of the Laboratory Genetic Metabolic Diseases, Academic Medical Center, UMC Amsterdam until 01.02.2018. From the beginning his main research interest has been focused on the Metabolic Functions of Peroxisomes in Health and Disease with a special interest for Zellweger Syndrome and Refsum Disease later followed by additional active research areas including Mitochondrial Fatty Acid Oxidation Disorders and Amino Acid Degradation Disorders. He has published >1000 peer reviewed papers, his H-factor is >75, and 35 students did their PhD under his supervision. He has received numerous awards, gave >250 lectures worldwide and has been Member of a large number of national and international scientific Review Boards and patient organisations. After his formal retirement he continues to work in the Laboratory Genetic Metabolic Diseases on a project basis

Sacha Ferdinandussa, PhD

Sacha Ferdinandusse studied Medical Biology at the University of Amsterdam and did her PhD at the Laboratory Genetic Metabolic Diseases at the Academic Medical Center (Amsterdam UMC) under supervision of Prof. Ronald Wanders (thesis entitled ‘New insights in peroxisomal beta-oxidation’). She continued as postdoctoral researcher in the same laboratory first on a grant from the Dutch Research Council (NWO) on the role of peroxisomes in bile acid biosynthesis and then on a grant of the European Leukodystrophy Association (ELA) entitled ‘Role of phytanic acid in nervous system pathogenesis using mouse models for Refsum disease’. She is a registered Clinical Laboratory Geneticist (Biochemical Genetics), is staff member of the Laboratory Genetic Metabolic Diseases, Amsterdam UMC, and has the daily supervision of the enzyme diagnostic section.

Bart Leroy, MD, PhD

Bart Leroy is Head of the Department of Ophthalmology, and Staff Member at the Center for Medical Genetics at the Ghent University Hospital and Ghent University, where he has been working since 01/09/2001. He is Full Professor of Ophthalmology and Ophthalmic Genetics at Ghent University. Since August 2013, Bart also has a part-time position (20%) as an attending physician at the Division of Ophthalmology & Center for Cellular & Molecular Therapeutics at Children's Hospital of Philadelphia, Philadelphia, PA, USA. Bart is an ophthalmologist and clinical geneticist specialised in inherited eye disorders and systemic conditions affecting the eye. In collaboration with Profs J Bennett, AM Maguire and T Aleman at the University of Pennsylvania and Children’s Hospital of Philadelphia, Philadelphia, PA, USA, and the team in Ghent, Bart is involved in phenotyping and genotyping studies and gene therapy projects for inherited retinal blindness. In view of this latter work, he received a Senior Clinical Investigator grant of the Research Foundation - Flanders (Belgium) from 2010 to 2015 & 2015-2020. He is the (co-)recipient of 27 scientific grants and prizes. He is a member and Board member of several professional organisations, including the International Society for Genetic Eye Disease & Retinoblastoma and the Société de la Génétique Ophtalmologique Francophone and the Belgian Ophthalmological Society

Rachel Huckfeldt, MD, PhD

Dr. Huckfeldt is an Assistant Professor of Ophthalmology at Harvard Medical School and a clinician-scientist at Massachusetts Eye and Ear. She completed her MD and PhD training at Washington University in St Louis with doctoral research focused on retinal development. After finishing an ophthalmology residency at Mass Eye and Ear, Dr. Huckfeldt conducted postdoctoral research focused on novel therapeutics at the University of Pennsylvania followed by clinical fellowships in medical retina (University of Iowa) and inherited retinal disorders (Mass Eye and Ear). Her clinical practice is focused on the care of individuals with inherited retinal disorders. She is dedicated to bringing new therapies to clinic and leads Mass Eye and Ear’s participation in multiple clinical trials of genetic therapies. As Co-Chair Elect of the Foundation Fighting Blindness Consortium, she also provides leadership to the Consortium and its multicenter clinical studies focused on individual with inherited retinal disorders. Finally, Dr. Huckfeldt is committed to clinical education and is the director of the Inherited Retinal Degenerations fellowship at Mass Eye and Ear.

Ann B. Moser, BA

Ann Moser is Associate Professor Emerita of Neurology at the Johns Hopkins University. Since 1961 Ann has been investigating lipid metabolism in inborn errors of metabolism together with her late husband, Dr. Hugo W. Moser. They developed the original methods for quantitation of very long-chain fatty acids (VLCFA) in plasma and cells by gas chromatography that are used to diagnose X-linked adrenoleukodystrophy (ALD) and related peroxisomal disorders. Together with her collaborators she also developed, tested, and validated the methodology for newborn screening of ALD by LC-MS/MS using punches from Guthrie blood spot cards. The ALD newborn screening assay, which measures the C26:0 content of lysophosphatidylcholine (C26-LPC), was approved in 2015 by the Secretary of Health and Human Services to be added to the newborn screening programs in all US states. In collaboration with the Jackson Laboratories, the LC-MS/MS measurement of C26-LPC and other complex lipids, and the GCMS measurement of total lipid fatty acids including phytanic acid are used to evaluate AAV9 therapy in the mouse models of ALD and the Zellweger spectrum disorders.

Although formally retired, Ann is actively collaborating with the Global DARE Foundation and has recently completed testing of phytanic acid, phytol and phytyl fatty esters in 60 food items. It’s been almost 30 years since initial phytanic acid testing in approximately 150 food items was published and formed the basis for a low phytanic acid diet critical to the management of Refsum Disease. Since then farming practices and food manufacturing processes have changed dramatically as well new precursors to phytanic acid have been identified. Updating previous testing and the potential to expand diet choices will increase the quality of life for people with Refsum Disease.

Wedad Fallatah, MD, PhD

Wedad Fallatah is a physician-scientist with an experience in Peroxisomal Disorders. Supervised by Prof. Nancy Braverman, Dr. Fallatah pursued her doctoral studies in Human Genetics at McGill University. Her PhD work provides a distinct contribution to the field of peroxisomal disorder: Rhizomelic Chondrodysplasia Punctata (RCDP) as it described the first comprehensive natural history study of mild RCDP patients. Dr. Fallatah’s PhD studies also found remarkable genotype-phenotype correlations in RCDP mouse model, identified a set of measurable outcomes and contributed to preclinical testing of a novel plasmalogen therapy. Dr. Fallatah is currently very interested in further advancing her career in the field of peroxisomal disorders research. She will join the Peroxisomal laboratory team as a postdoctoral fellow at Kennedy Krieger Institute and Johns Hopkins University. She recently received an “Excellence Award in Human Genetics” at McGill University, recognizing her contributions nationally and internationally in the form of talks, posters and publications.

Reinhard Klingel, MD, PhD

Reinhard Klingel is an Associate Professor of Medicine and Nephrology at the University Hospital of the University of Mainz in Germany. After earning his MD from the University of Mainz in 1985, he pursued postdoctoral research at the German Center for Cancer Research. He received board certifications in General Internal Medicine, Nephrology, and Lipidology during his subsequent clinical training and education. Since 1999, he has been head of the newly founded Apheresis Research Institute in Cologne, Germany. Dr. Klingel has been serving on the editorial board for the Journal of Clinical Apheresis, and as member of the guideline committee of the American Society for Apheresis and the German Society for Nephrology. He is also involved in scientific advisory boards for German Lipid-Liga/DGFF. In 2021, he was elected to the board of the International Society for Apheresis. His particular interest for Refsum Disease has started in 2003 with publication of a case series of patients with clinically severe Refsum Disease, including a pair of twins, who received long-term treatment with therapeutic apheresis.

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