Funding for this research was provided by:
International Atomic Energy Agency
Received: 26 May 2020
Accepted: 30 November 2020
First Online: 16 December 2020
Ethics approval and consent to participate
: Ethical approval was granted by the Ethics Review Committee of Aga Khan University prior to commencement of the study. All parents provided written consent to enrol their infants in the study.
: Not applicable.
: The authors declare that they have no competing interests.