Cornelis Kramers MD, PhD is an internist clinical pharmacologist. He works at the Radboud University Medical Center (both at the department of Internal Medicine and Pharmacology-Toxicology) and the department of Clinical Pharmacy of the Canisius Wilhelmina Ziekenhuis, both in Nijmegen, the Netherlands. He is chair of the division of Clinical Pharmacology of the Dutch Society for Internal Medicine, vice chair of the expert group in clinical toxicology (www.toxicologie.org). He devotes a large part of his time to training physicians and pharmacists in clinical pharmacology and toxicology. His research focuses mainly on medication safety and clinical toxicology.