1. Institute
of Pharmacy and Food Chemistry, University of Würzburg, Am
Hubland, D-97074 Würzburg, Germany
2. Pharmacology
and Toxicology, Institute of Pharmacy, Gerhard-Domagk-Straße 3,D-53121 Bonn, Germany
3. Institute
for Pharmacy, Free University Berlin, Königin-Luise-Straße
2 und 4, D-14195 Berlin, Germany
4. Institute
of Pharmaceutical Biology, Molecular-, Cellular-, and Pharmacobiology
Section, University of Bonn, Nussallee 6, D-53115 Bonn, Germany