1. Doctoral Student, Department of Orthodontics, Research Center, School of Dentistry, Universidad Autónoma del Estado de México, Toluca, Estado de México, Mexico.
2. Professor and Chair of Research Center, School of Dentistry, Universidad Autónoma del Estado de México, Toluca, Estado de México, Mexico.
3. Professor, Health Attention Department, Universidad Autónoma Metropolitana, Unidad Xochimilco, Mexico City, Mexico.
4. Professor, Research Center, School of Dentistry, Universidad Autónoma del Estado de México, Toluca, Estado de México, Mexico.