1. Pharmacology & Toxicology Section; Institute of Pharmacy; University of Bonn; Bonn Germany
2. Department of Pharmaceutical Chemistry; Institute of Pharmacy; University of Würzburg; Würzburg Germany
3. Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Farmaceutica ‘Pietro Pratesi’; Università degli Studi di Milano; Milano Italy
4. Institute of Pharmacology & Toxicology; University of Bonn; Bonn Germany
5. Molecular-, Cellular-, and Pharmacobiology Section; Institute of Pharmaceutical Biology; University of Bonn; Bonn Germany