1. Usman Ahmad:
Department of Surgery, Division of Cardiothoracic Surgery,Aga Khan University, Karachi, Pakistan
2. Muhammad A. Javed:
Department of Surgery, Division of Cardiothoracic Surgery,Aga Khan University, Karachi, Pakistan
3. Saulat H. Fatimi:
Department of Surgery, Division of Cardiothoracic Surgery,Aga Khan University, Karachi, Pakistan