1. Department of Pharmacognosy, University of Lagos, Nigeria
2. Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität, Düsseldorf, Germany
3. Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
4. Department of Chemistry, University of Aberdeen, Aberdeen, UK
5. Department of Pharmacognosy, Obafemi Awolowo University, Ile-Ife, Nigeria