1. Dept. of Pharmacology and Biomolecular Sciences; Università degli Studi di Milano; via Balzaretti 9 20133 Milano Italy
2. Dept. of Chemistry; Università degli Studi di Milano; via Golgi 19 20133 Milano Italy
3. Div. of Clinical Pharmacology and Toxicology; Inst. of Pharmacological Sciences of Southern Switzerland; Ente Ospedaliero Cantonale, via Tesserete 46 6900 Lugano Switzerland
4. Dept. of Clinical Pharmacology and Toxicology; Univ. Hospital Zurich; Rämistrasse 100 8091 Zurich Switzerland
5. Natl. Poisons Centre, Tox Info Suisse; Assoc. Inst. of the Univ. of Zurich; Freiestrasse 16 8032 Zurich Switzerland