1. Faculty of Biotechnology & Biomolecular Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
2. Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
3. Herbal Medicine Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur, Malaysia
4. Institute of Tropical Forestry and Forestry Products, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia