1. School of Pharmaceutical Sciences, Universiti Sains Malaysia, Pulau Pinang, 11800 USM, Malaysia
2. Tropical Medicine Research Institute (TMRI), National Centre for Research (NCR), 11111 Khartoum, Sudan
3. Department of Pharmacy, East West University, Jahurul Islam City, Plot no-A/2, Aftabnagar, Dhaka-1212, Bangladesh
4. School of Chemical Sciences, Universiti Sains Malaysia, Pulau Pinang, 11800 USM, Malaysia