1. Laboratorium für Organische ChemieETH Zurich Vladimir-Prelog-Weg 3 8093 Zurich Switzerland
2. Departments of Biochemistry and Medical BiophysicsUniversity of Toronto Medical Sciences Building, 5318, 1 King's College Circle Toronto ON M5S 1A8 Canada
3. The Campbell Family Institute for Cancer ResearchUniversity Health Network 101 College Street Toronto ON M5G 1L7 Canada
4. Swiss Tropical and Public Health Institute Socinstrasse 57 4002 Basel Switzerland
5. University of Basel Petersplatz 1 4003 Basel Switzerland
6. Biochemie-Zentrum Heidelberg (BZH)Universität Heidelberg Im Neuenheimer Feld 328 69120 Heidelberg Germany