1. Department of Health Sciences and Technology, ETH Zurich, Schmelzbergstrasse 9, Zurich 8092, Switzerland
2. Pharmacology and Therapeutics, Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
3. Philip Morris Products SA, Quai Jeanrenaud 3, Neuchatel 2000, Switzerland