1. Universidad Autónoma Metropolitana, México City, Mexico
2. School of Dentistry, Research Department, Universidad Juárez del Estado de Durango (UJED), Durango, Mexico
3. Health Care Department, Universidad Autónoma Metropolitana, Xochimilco, Mexico City, Mexico
4. Instituto Nacional de Oncología y Radiobiología (INOR), La Habana 10400, Cuba