Funding for this research was provided by:
National Institutes of Health (US) [MHIRT Program] (5T37MD001425)
Received: 26 February 2018
Accepted: 25 January 2019
First Online: 7 February 2019
Ethics approval and consent to participate
: The research plan, recruitment procedure and consent form were approved by the University of Michigan Institutional Review Boards IRB#HUM00128035. The IRB Committee for the Mongolian National University of medical Sciences also approved the study (#2017/3–06). The parents or guardians of all children provided written informed consent after receiving detailed explanations of the study and recruitment letter.
: Not applicable.
: The authors declare that they have no competing interests.
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