Ajay Kumar Mishra1, Ramya Iyadurai2. 1. Department of Internal Medicine, Christian Medical College, Vellore, Tamil Nadu, India. Electronic address: ajaybalasore@gmail.com. 2. Professor and Head of Department of Internal Medicine UnitV, Department of Internal Medicine, Christian Medical College, Vellore, Tamil Nadu, India. Electronic address: iramya77@gmail.com.