R V Nampoothiri1, S Sreedharanunni2, B A Chhabria3, S Jain3. 1. Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India. 2. Department of Hematopathology, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India. 3. Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India. email: hematpgi@gmail.com.