1. Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
2. Centre for Natural Products Research and Drug Development, Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
3. Natural Sciences and Science Education AG, National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Singapore
4. Sime Darby Technology Center Sdn. Bhd., 1st Floor, Block B, UPM-MTDC Technology Center III, Lebuh Silikon, Universiti Putra Malaysia, Serdang, 43400 Selangor, Malaysia