1. National School of Nursing and Obstetrics (ENEO) National Autonomous University of Mexico (UNAM) Mexico City Mexico
2. National Institute of Rehabilitation Mexico City Mexico
3. National Institute of Public Health Cuernavaca Mexico
4. National Institute of Cardiology Mexico City Mexico
5. National Autonomous University of Nuevo León (UANL) Monterrey Mexico
6. General Hospital Dr. Manuel Gea González Mexico City Mexico
7. Jesus Hospital Mexico City Mexico
8. National Institute of Neurology and Neurosurgery Mexico City Mexico