1. Cardiovascular Critical Care Unit Instituto Nacional de Cardiología Ignacio Chávez Mexico City Mexico
2. Heart Failure Service Hospital Naval de Especialidades Veracruz Veracruz Mexico
3. Coronary Care Unit Instituto Nacional de Cardiología Ignacio Chávez Mexico City Mexico
4. Hospitalization Service Instituto Nacional de Cardiología Ignacio Chávez Mexico City Mexico
5. Outpatient Clinic Instituto Nacional de Cardiología Ignacio Chávez Mexico City Mexico
6. Occupational Health Research Unit Centro Médico Nacional Siglo XXI Mexico City Mexico
7. Surgical and Medical Specialties Direction Instituto Nacional de Cardiología Ignacio Chávez Mexico City Mexico