Ethical approval

TB Tonatiuh Barrientos-Gutierrez
RZ Rodrigo Zepeda-Tello
ER Eliane R. Rodrigues
AC Arantxa Colchero-Aragonés
RR Rosalba Rojas-Martínez
EL Eduardo Lazcano-Ponce
MH Mauricio Hernández-Ávila
JR Juan Rivera-Dommarco
RM Rafael Meza
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This study (No 1456–6988) is exempt from approval by internal review board (reviewed by National Institute of Public Health Ethics, Research and Biosecurity Committees).

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