Received: 8 November 2021
Accepted: 11 April 2022
First Online: 20 April 2022
: Ethical approval was obtained from Ethics Committee of KIMS,Hubballi and other five study sites. Written informed consent was obtained from legal guardians/parents of participants. A copy of consent form was given to parents/ guardian. Personal information (paper and electronic registers) were stored in an appropriate manner so as to ensure full confidentiality.
: Not applicable.
: The authors declare that they have no competing interests.