title: Authors' response.
authors.affiliation: Army Hospital (Research & Referral), New Delhi, India.
authors.forename: V
authors.initials: V
authors.lastname: Nair
authors.affiliation: Army Hospital (Research & Referral), New Delhi, India.
authors.forename: H
authors.initials: H
authors.lastname: Madan
authors.affiliation: Army Hospital (Research & Referral), New Delhi, India.
authors.forename: S
authors.initials: S
authors.lastname: Sofat
authors.affiliation: Army Hospital (Research & Referral), New Delhi, India.
authors.forename: P
authors.initials: P
authors.lastname: Ganguli
authors.affiliation: Army Hospital (Research & Referral), New Delhi, India.
authors.forename: M J
authors.initials: MJ
authors.lastname: Jacob
authors.affiliation: Military Hospital, Cardio Thoracic Centre, Pune, India.
authors.forename: R
authors.initials: R
authors.lastname: Datta
authors.affiliation: Military Hospital, Cardio Thoracic Centre, Pune, India.
authors.forename: P
authors.initials: P
authors.lastname: Bharadwaj
authors.affiliation: Military Hospital, Cardio Thoracic Centre, Pune, India.
authors.forename: R S
authors.initials: RS
authors.lastname: Sarkar
authors.affiliation: Military Hospital, Cardio Thoracic Centre, Pune, India.
authors.forename: A J
authors.initials: AJ
authors.lastname: Pandit
authors.affiliation: Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.
authors.forename: S
authors.initials: S
authors.lastname: Nityanand
authors.affiliation: Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.
authors.forename: P K
authors.initials: PK
authors.lastname: Goel
authors.affiliation: Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.
authors.forename: N
authors.initials: N
authors.lastname: Garg
authors.affiliation: Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India.
authors.forename: S
authors.initials: S
authors.lastname: Gambhir
authors.affiliation: Christian Medical College, Vellore, India.
authors.forename: P V
authors.initials: PV
authors.lastname: George
authors.affiliation: Christian Medical College, Vellore, India.
authors.forename: S
authors.initials: S
authors.lastname: Chandy
authors.affiliation: Christian Medical College, Vellore, India.
authors.forename: V
authors.initials: V
authors.lastname: Mathews
authors.affiliation: Christian Medical College, Vellore, India.
authors.forename: O K
authors.initials: OK
authors.lastname: George
authors.affiliation: Postgraduate Institute of Medical Education & Research, Chandhigarh, India.
authors.forename: K K
authors.initials: KK
authors.lastname: Talwar
authors.affiliation: Postgraduate Institute of Medical Education & Research, Chandhigarh, India.
authors.forename: A
authors.initials: A
authors.lastname: Bahl
authors.affiliation: Postgraduate Institute of Medical Education & Research, Chandhigarh, India.
authors.forename: N
authors.initials: N
authors.lastname: Marwah
authors.affiliation: Postgraduate Institute of Medical Education & Research, Chandhigarh, India.
authors.forename: A
authors.initials: A
authors.lastname: Bhatacharya
authors.affiliation: All India Institute of Medical Sciences, New Delhi, India.
authors.forename: B
authors.initials: B
authors.lastname: Bhargava
authors.affiliation: All India Institute of Medical Sciences, New Delhi, India.
authors.forename: B
authors.initials: B
authors.lastname: Airan
authors.affiliation: All India Institute of Medical Sciences, New Delhi, India.
authors.forename: S
authors.initials: S
authors.lastname: Mohanty
authors.affiliation: All India Institute of Medical Sciences, New Delhi, India.
authors.forename: C D
authors.initials: CD
authors.lastname: Patel
authors.affiliation: Department of Biotechnology, Government of India, New Delhi, India.
authors.forename: A
authors.initials: A
authors.lastname: Sharma
authors.affiliation: All India Institute of Medical Sciences, New Delhi, India.
authors.forename: S
authors.initials: S
authors.lastname: Bhatnagar
authors.affiliation: Institute of Nuclear Medicine & Allied Sciences, Delhi, India.
authors.forename: A
authors.initials: A
authors.lastname: Mondal
authors.affiliation: Christian Medical College, Vellore, India.
authors.forename: J
authors.initials: J
authors.lastname: Jose
authors.affiliation: Christian Medical College, Vellore, India.
authors.forename: A
authors.initials: A
authors.lastname: Srivastava