1 National Centre for Medical Genetics, School of Medicine & Medical Sciences, University College Dublin, Our Lady's Children's Hospital, Dublin, Ireland.
2 Molecular Genetics of Rare Disorders, University Hospital of Montpellier and INSERM U827, IURC (Institut Universitaire de Recherche Clinique), Montpellier, France.
3 Institute of Inherited Metabolic Disorders, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
4 Biomedical Quality Assurance Research Unit, Department of Human Genetics, University of Leuven, Leuven, Belgium.
5 Department of Paediatrics, Universitats-Kinderspital Beider Basel (UKBB), Basel, Switzerland.
6 Department of Human Genetics, Radboud University Medical Centre, Nijmegen, The Netherlands.
7 Institute of Human Genetics, Hannover Medical School, Hannover, Germany.
8 VSOP-National Patient Alliance for Rare and Genetic Disorders, Soest, The Netherlands.
9 Division of Obstetrics and Gynecology, Clinical Institute of Medical Genetics, University Medical Center, Ljubljana, Slovenia.
10 Department of Genetics, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.
11 Division 3 Health/Forensics, Deutsche Akkreditierungsstelle GmbH (DAkkS), Frankfurt am Main, Germany.
12 Department of Medical Genetics, University of Pavia, Pavia, Italy.
13 CEQAS, John Radcliffe Hospital, Oxford University Hospitals NHS Trust, Oxford, UK.