title: Author reply.
authors.affiliation: Department of Anesthesia and Critical Care, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Sukhen
authors.initials: S
authors.lastname: Samanta
authors.affiliation: Department of Critical Care Medicine, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
authors.forename: Sujay
authors.initials: S
authors.lastname: Samanta
authors.affiliation: Department of Critical Care Medicine, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India.
authors.forename: Abhishek
authors.initials: A
authors.lastname: Jha