Funding for this research was provided by:
Indian Council of Medical Research (5/4/1-16/05-NCD-II)
Received: 27 December 2018
Accepted: 31 May 2019
First Online: 17 June 2019
Ethics approval and consent to participate
: Ethics approval was obtained from Ethics Committee, All India Institute of Medical Sciences (Ref. no. 3/5.9.200023). Written signed consent was obtained from the participants.
: Not applicable.
: The authors declare that they have no competing interests.