1. Natural & Medical Sciences Research Center, University of Nizwa, PO Box 33, Birkat Al Mauz, Nizwa, 616, Sultanate of Oman
2. Department of Chemistry, COMSATS University Islamabad Abbottabad Campus, Abbottabad, Pakistan
3. Division of Pharmacy Practice & Policy, School of pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK