professor of plant cell biotechnology and pharmacognosy, Leiden University

Professor at Faculty of Food Science and Technology, Universiti Putra Malaysia

University of Medicine and Pharmacy "Carol Davila", Bucharest

Johns Hopkins University School of Medicine

Professor University of Pretoria

Lecturer Natural Products Chemistry, Wageningen University

Distinguished Professor of Medicinal Phytochemistry University of Nizwa

James Hutton institute

Universidade do Vale do Itajai - UNIVALI

Dipartimento di Farmacia, Università di Pisa