1. Committee on Quality of Health Care in America. To err is human: Building a safer health systemhttps://www.nap.edu/catalog/9728/to-err-is-human-building-a-safer-health-system
2. The Organisation for Economic Co-operation and Development (OECD): Health indicatorshttp://stats.oecd.org/Index.aspx?DatasetCode=HEALTH_STAT
3. European Commission: Health indicatorshttp://ec.europa.eu/health/indicators/policy_en
4. Organizacion Mundial de la Salud: Seguridad del pacientehttp://www.who.int/patientsafety/es/