Mexican Institute of social security: highly specialized medical unit number 1 Bajio, Leon, Guanajuato, Mexico
Ambulatory care medical unit number 55 (UMAA 55), Leon, Guanajuato, Mexico
Hospital General de Zona N 4. Instituto Mexicano del Seguro Social, Celaya, Guanajuato, Mexico
Tertiary reference oncology center, Mexico, Distrito Federal, Mexico
Oncology Research Unit, Mèxico DF, DF, Mexico
Research Unit in Clinical Epidemiology, Specialties Hospital. Mexican Institute of Sociaql Security, Guadalajara, Jalisco, Mexico
Breast Clinic. Oncologic Institute of Jalisco, Guadalajara, Jalisco, Mexico
Department of Surgery and Department od Anesthesiology. Specialties Hospital. Westerm Medical Center, Mexican Institute of Social Security., Guadalajara, Jalisco, Mexico
Biomedical Research Unit, Durango, Mexico