[1] National Autonomous University of Mexico,Laboratory of Research in Education and Dentistry, Faculty of Higher Studies Iztacala (FES)
[2] (UNAM),Specialization in Pediatric Stomatology, Faculty of Higher Studies Iztacala (FES)
[3] National Autonomous University of Mexico,Faculty of Health Sciences
[4] (UNAM),Laboratory of Public Health Research, Iztacala, Faculty of Higher Studies (FES)
[5] Autonomous University of Baja California,Laboratorio de Investigación en Educación y Odontología, Facultad de Estudios Superiores Iztacala
[6] National Autonomous University of Mexico (UNAM),undefined
[7] Universidad Nacional Autónoma de México,undefined