1. Division of Pharmacognosy & Natural Products Chemistry, Department of Pharmacy, University of Athens, Athens, Greece
2. Laboratory of Animal Physiology, Department of Animal Biology and Physiology, University of Yaoundé 1, Yaounde, Cameroon
3. Molecular Cell Physiology & Endocrinology, Technische Universität, Dresden, Germany
4. Division of Pharmaceutical Chemistry, Department of Pharmacy, Athens, Greece