Ariba Moin1, Huda Fatima2, Tooba F Qadir3. 1. Department of Internal Medicine, Dow University of Health Sciences, Karachi 74200, Pakistan. Electronic address: ariba_moin@hotmail.com. 2. Department of Internal Medicine, Dow University of Health Sciences, Karachi 74200, Pakistan. 3. Department of Psychiatry, Dow University of Health Sciences, Karachi 74200, Pakistan.