title: Author's reply.
authors.affiliation: Department of Academic Research, Chest Research Foundation, Pune, Maharashtra, India E-mail: ssalvi@crfindia.com.
authors.forename: Sundeep Santosh
authors.initials: SS
authors.lastname: Salvi
authors.affiliation: Department Medical Services, Cipla Limited, Mumbai, Maharashtra, India.
authors.forename: Abhijit
authors.initials: A
authors.lastname: Vaidya
authors.affiliation: Department of Academic Research, Chest Research Foundation, Pune, Maharashtra, India E-mail: ssalvi@crfindia.com.
authors.forename: Rahul Ramesh
authors.initials: RR
authors.lastname: Kodgule
authors.affiliation: Department Medical Services, Cipla Limited, Mumbai, Maharashtra, India.
authors.forename: Jaideep
authors.initials: J
authors.lastname: Gogtay