1. Hospital Universitario de Getafe; Geriatric Unit; Carretera de Toledo (Km 12,500) Madrid Spain 28905 Getafe (Madrid)
2. Iberoamerican Cochrane Centre; C/ Sant Antoni Maria Claret 167 Barcelona Barcelona Spain 08025
3. University hospital of Canary Islands; UCICEC; C/ Ofra s/n La Laguna Santa Cruz de Tenerife Spain 38320
4. Universidad de Antofagasta; Faculty of Medicine and Dentistry; Antofagasta Chile
5. Servicio de Salud Antofagasta; Antofagasta Chile