Funding for this research was provided by:
Received: 30 October 2017
Accepted: 19 February 2018
First Online: 5 March 2018
Ethics approval and consent to participate
: Both studies were reviewed and approved by College of Medicine Research Ethics Committee (P.11/14/1658, P.09/14/1631). An informed consent was obtained from study participants’ guardians.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.