Akbar Shoukat Ali1, Afroza Aftab2, Arzoo Ajaz3. 1. Department of Anaesthesiology, The Aga Khan University Hospital, Karachi, Pakistan. 2. School of Nursing and Midwifery (SONAM), The Aga Khan University, Karachi, Pakistan. 3. Department of Pharmacy, Jinnah University for Women, Karachi, Pakistan.