Funding for this research was provided by:
Department of Biotechnology, Government of West Bengal (215-BT(Estt)/RD-08/2015 dated 16. 03.2015)
Received: 9 April 2020
Accepted: 1 October 2020
First Online: 14 October 2020
Ethics approval and consent to participate
: Ethical clearance to conduct the study was obtained from the Calcutta National Medical College and Hospital and Institutional Ethics committee for human research, <i>Pt</i>. Ravishankar Shukla University, Raipur. Written informed consent, prior to sample collection, was collected from each study participant or guardian, in case where the participant was a child.
: Not applicable.
: The authors declare that they have no competing interest.