Md. Ibrahim Khalil is Professor in the Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka, Bangladesh. Siew Hua Gan is Professor in the School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia. Bey Hing Goh is Associate Professor in the School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia and at the College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, PR China.