Head of Institute of Human Genetics, University of Regensburg, Regensburg, Germany.
Vice President of the German Society of Human Genetics
Rare Retinal Disease Center, AugenZentrum Siegburg, MVZ Augenärztliches Diagnostik- und Therapiecentrum Siegburg GmbH, Siegburg, Germany.
Department of Otorhinolaryngology, Radboud University Medical Center, Nijmegen, The Netherlands.
Insitute of Human Genetics, University of Regensburg, Regensburg, Germany.
Department of Human Genetics, Amsterdam UMC Locatie AMC, Amsterdam, North Holland, The Netherlands.
Director of Beijing Insitute of Ophthalmology, Vice president of Beijing Tongren Hospital, Capital Medical University, Beijing, China.
Department Physical Medicine & Rehabilitation, Sue & Bill Gross Stem Cell Research Center, University of California at Irvine, Irvine, United States.
Department of Ophthalmology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, United States.
Department of Ophthalmology, Baylor College of Medicine, Houston, United States.