title: Letter to editor.
authors.affiliation: Graded Specialist (Paediatrics) and Neonatologist, Command Hospital (Eastern Command), Kolkata, India.
authors.forename: Subhash Chandra
authors.initials: SC
authors.lastname: Shaw
authors.affiliation: Ex- Associate Professor (Physiology), Army College of Medical Sciences, Delhi, India.
authors.forename: Anupama
authors.initials: A
authors.lastname: Chowdhary