Michael Weiss, PhD, is Professor Emeritus of Pharmacokinetics and Pharmacodynamics at Martin Luther University Halle-Wittenberg, Halle (Saale), Department of Pharmacology,(Germany). He was visiting professor at University of Toronto in 1990 and at University of Queensland (Australia) in 2004/2007; where he became honorary professor in 2010. He has been teaching at Naresuan University, Phitsanulok (Thailand) in 2010 and 2011. His research interests are the analysis and modelling of pharmacokinetic and pharmacodynamic systems with emphasis on recirculatory and organ models, including receptor-mediated signal transduction. He is on the Editorial Boards of Journal of Pharmacokinetics and Pharmacodynamics, and International Journal of Clinical Pharmaology. Professor Weiss has published more than 170 peer reviewed papers and is author of the book “Theoretische Pharmakokinetik” (Berlin, 1990).