1Chief of Pulmonary institutes, Apollo Hospitals, Hyderabad
2Pulmonologist, Registrar, Department of Pulmonary Medicine, Sunshine Hospitals, Hyderabad
*Address for correspondence Dr. R. Vijai Kumar Head of Department, Pulmonary Medicine, Apollo Hospitals, Jubilee Hills, Hyderabad Email: drvijaipulmo@yahoo.co.in
Online published on 6 April, 2018.
