Funding for this research was provided by:
Minister of Health (I85I16001700005)
Received: 1 August 2018
Accepted: 7 May 2019
First Online: 21 May 2019
Ethics approval and consent to participate
: Approval of the protocol was obtained from the Institutional Review Board of the National Institute of Health, including the use of opt-out consent; that is, parents were fully informed about all study procedures through a form attached to their questionnaire and the lack of a returned form was taken to imply consent to their child’s participation. The child’s assent was verbal.
: Not applicable.
: The authors declare that they have no competing interests.
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