1. School
of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
2. Division
of Pharmaceutical Biology, University of Basel, Klingelbergstrasse
50, 4056 Basel, Switzerland
3. Department
of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G. C., Evin, Tehran, Iran
4. Plantasav, B.P. 10308 Niamey, Niger
5. Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002 Basel, Switzerland
6. University of Basel, Petersplatz
1, 4003 Basel, Switzerland