Jan studied Medicine, Computer Sciences and Clinical Pharmacology at the Catholic University, Nijmegen, Netherlands. He also has a PhD on growth hormone deficiency in adults from the same institution.
Jan’s has worked as a medical computer scientist, a medical sciences lecturer and, since 1990, has been a clinical pharmacology assessor at the Dutch Medicines Evaluation Board (MEB). Jan’s is a European clinical expert (EMA) on, amongst others, endocrinology, gastrointestinal disorders and urology. Jan has held a number of positions on National and International Committees and is currently amongst others member of the Cross-Committee Task Force on Patient Registries.