1. School of Pharmaceutical Sciences University of Geneva, University of Lausanne, CMU, Rue Michel‐Servet 1 1206 Geneva Switzerland
2. Herbal Medicine Research Centre Institute for Medical Research, Jalan Pahang 50588 Kuala Lumpur Malaysia
3. Department of Biochemistry University of Stellenbosch, Private Bag X1 Matieland 7602 South Africa
4. Institute of Biology University of Neuchâtel, Rue Emile‐Argand 11 2000 Neuchâtel Switzerland