Funding for this research was provided by:
United Nations Children’s Fund, Mexico (SC180081)
Received: 16 August 2019
Accepted: 24 September 2020
First Online: 15 October 2020
Ethics approval and consent to participate
: The ethics committee of the National Institute of Public Health of Mexico approved the protocol (number CI:464–2017). All participants provided informed consent.
: Not applicable.
: The authors declare no competing interests.