1. Department of Gastroenterology‐Hepatology and Center for Metabolic Diseases University Hospital Leuven Leuven Belgium
2. Department of Medicine University Hospital of Helsinki Helsinki Finland
3. Centro de Investigacion Traslacional Instituto Nacional de Pediatría de Mexico Mexico City Mexico
4. Department of Neurology National Taiwan University Hospital Taipei Taiwan
5. Section on Gastroenterology and Hepatology Wake Forest University/North Carolina Baptist Medical Center Winston‐Salem North Carolina USA
6. Department of Medicine Thomas Jefferson University Philadelphia Pennsylvania USA
7. Medical Genetics Section, Virgen de la Arrixaca University Hospital, IMIB‐Arrixaca Universidad de Murcia Murcia Spain
8. Division of Endocrinology, Department of Internal Medicine Stadtspital Zürich Zürich Switzerland
9. Department of Biometrics and Department of Clinical Development Alnylam Pharmaceuticals Cambridge Massachusetts USA
10. Department of Clinical Development Alnylam Pharmaceuticals Cambridge Massachusetts USA
11. Porphyria Unit, Department of Gastroenterology St. Ivan Rilski University Hospital Sofia Bulgaria