1. UGent Laboratory of Tropical and Subtropical Agriculture and Ethnobotany; Coupure Links 653 Gent Belgium
2. KU Leuven Toxicology and Pharmacology; Herestraat 49 PO Box 922 Leuven Belgium
3. Faculty of Tropical AgriSciences; Czech University of Life Sciences Prague; Kamycka 129 Prague 6 - Suchdol 165 21 Czech Republic