1. Rudolf-Boehm-Institute of Pharmacology and Toxicology, Clinical Pharmacology, Faculty of Medicine, University of Leipzig, Härtelstrasse 16-18, D-04107 Leipzig, Germany
2. Institute of Pharmacology, Faculty of Medicine, Philipps-University Marburg, Karl-von-Frisch-Strasse 1, D-35032 Marburg, Germany
3. Institute for Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marbacher Weg
6, D-35032 Marburg, Germany
4. Institute of Pharmacy, Department of Pharmaceutical Technology, Faculty of Biology and Pharmacy, Friedrich-Schiller-University Jena, Otto-Schott-Strasse 41, D-07745 Jena, Germany