Dr. phil. Dr. med. Stephan Dressler studied medicine and philosophy at Freie Universitaet Berlin. He has worked for the National AIDS Centre at the Federal Health Office, Germany. In 1992 he became a founding member of the European AIDS Treatment Group (EATG). His current work focuses on patient education seminars (HIV, hepatitis, tuberculosis) in Central and Eastern Europe. He also serves as abstract reviewer for International AIDS Society (IAS) and World AIDS conferences, and is a member of the European Community Advisory Board (ECAB). His publications include various dictionaries and encyclopedias, articles on research ethics and philosophy with children.