1. Department of Internal Medicine, RG Kar Medical College and Hospital, 1, Khudiram Bose Sarani, Kolkata 700004, India
2. Department of Dermatology, Venereology, and Leprosy, RG Kar Medical College and Hospital, 1, Khudiram Bose Sarani, Kolkata 700004, India
3. , Department of Internal Medicine, RG Kar Medical College and Hospital, 1, Khudiram Bose Sarani, Kolkata, 700004, India