United States Public Health ServiceCenters for Disease Control and Prevention (U.S.)National Center for Health Care Technology (U.S.)National Center for Health Statistics (U.S.)United States Agency for Healthcare Research and QualityUnited States Food and Drug AdministrationUnited States Health Resources and Services AdministrationUnited States Indian Health ServiceUnited States Office of Research IntegrityUnited States Substance Abuse and Mental Health Services AdministrationUnited States Dept. of Health and Human ServicesPublic Health Service (U.S.)Servicio de Salud Pública (E.E.U.U.)USPHS Una organización integrante del DEPARTMENT OF HEALTH AND HUMAN SERVICES que se encarga de la protección y mejoramiento de la salud de la nación.