1. Department of Cardiothoracic and Vascular Surgery, Institute of Postgraduate Medical Education & Research, SSKM Hospital, AJC Bose Road, PO-Bhowanipore, Kolkata 700020, India
2. Department of Cardiothoracic and Vascular Anesthesiology, Institute of Postgraduate Medical Education & Research, SSKM Hospital, Kolkata 700020, India