Received: 16 September 2020
Accepted: 7 January 2021
First Online: 15 January 2021
Ethics approval and consent to participate
: This research was approved by the Institutional Review Committee of International Friendship Children’s Hospital, Kathmandu, Nepal. A written informed consent was taken from their parents before participating in the study. Data regarding personal information and existing other infectious disease were coded and kept confidential.
: Not applicable.
: The authors declare that they have no competing interests.