1. Division of Clinical Pharmacology, Department of Internal Medicine, University of Munich, 80336 Munich, Germany.
2. Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, Suita 565–0871, Osaka, Japan.
3. Department of Virology, Max von Pettenkofer Institute and Gene Center, University of Munich, 81377 Munich, Germany.
4. Division of Clinical Pharmacology, University Hospital, University of Bonn, 53105 Bonn, Germany.