Affiliation: | F. A. Khan, MB, BS, FRCA, Associate Professor, Department of Anaesthesia, The Aga Khan University Hospital, Stadium Road, P.O. Box 3500, Karachi-74800, Pakistan.;R. S. Kamal, MB, BS, FRCA Professor, Department of Anaesthesia, The Aga Khan University Hospital, Stadium Road, P.O. Box 3500, Karachi-74800, Pakistan. |