Text and Data Mining valid from 2018-07-04
Received: 21 March 2018
Accepted: 26 June 2018
First Online: 4 July 2018
Ethics approval and consent to participate
: The study was approved by Ethics Committee of the Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India. An informed written consent was obtained from one of the parents for each child studied.
: The consent document for study subjects included consent for publication of data (after removing any identifying information).
: The authors declare that they have no competing interests.
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