Hans-Dieter Holtje is director of the Institute of Pharmaceutical Chemistry at the Heinrich-Heine-Universitat Dusseldorf (Germany) where he also holds the chair of Medicinal Chemistry. His main interest is the molecular mechanism of drug action. Wolfgang Sippl is Professor of Pharmaceutical Chemistry at the Martin-Luther-University of Halle-Wittenberg (Germany). He is interested in 3D QSAR, molecular docking and molecular dynamics, and their applications in drug design and pharmacokinetics. Didier Rognan leads the Drug Bioinformatics Group at the Laboratory for Molecular Pharmacochemistry in Illkirch (France). He is mainly interested in all aspects (method development, applications) of protein-based drug design and virtual screening. Gerd Folkers is Professor of Pharmaceutical Chemistry at the ETH Zurich (Switzerland). The focus of his research is the molecular interation between drugs and their binding sites.