1 Madrid Regional Health Authority, Public Health Directorate, San Martín de Porres, 6, 28036 Madrid, Spain. Electronic address: maria.estebanv@salud.madrid.org.
2 Madrid Regional Health Authority, Public Health Directorate, San Martín de Porres, 6, 28036 Madrid, Spain.
3 Preventive Medicine Service, Puerta de Hierro-Majadahonda Hospital, Manuel de Falla, 1, Majadahonda, 28222 Madrid, Spain.