1. Section of Cardiothoracic Surgery, Department of Surgery, Aga Khan University, Karachi, Pakistan
2. Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Boston, MA, USA
3. Medical College, Aga Khan University, Karachi, Pakistan
4. Dow Medical College, Dow University of Health Sciences, 147-B/1,Khayaban-e-Bahria, Phase 7, D.H.A., Karachi, Pakistan
5. Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan