Zia Ul Mustafa1, Chia Siang Kow2, Syed Shahzad Hasan3. 1. District Headquarter Hospital, Pakpattan, Pakistan. 2. School of Postgraduate Studies, International Medical University, Kuala Lumpur, Malaysia. Electronic address: chiasiang_93@hotmail.com. 3. Department of Pharmacy, University of Huddersfield, Huddersfield, UK; School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, Australia.