Heng, Huay Chin; Faculty of Pharmacy, Universiti Kebangsaan Malaysia, 50300 Kuala Lumpur, Malaysia; Zulfakar, Mohd Hanif; Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, 50300 Kuala Lumpur, Malaysia; Ng, Pei Yuen; Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia,
50300 Kuala Lumpur, Malaysia