1. Faculty of Dentistry, Autonomous University of Yucatan, Merida, YUC, Mexico
2. Health Systems Research Centre, National Institute of Public Health, Cuernavaca, MOR, Mexico
3. Academic Area of Dentistry of Health Sciences Institute, Autonomous University of Hidalgo State, Pachuca, HGO, Mexico
4. Advanced Studies and Research Center in Dentistry “Dr. Keisaburo Miyata”, School of Dentistry, Universidad Autónoma del Estado de México, Toluca, MEX, Mexico
5. Faculty of Dentistry, Autonomous University of Campeche, Campeche, CAM, Mexico