1. Division of Clinical Epidemiology; Complejo Hospitalario Universitario A Coruña (CHUAC); SERGAS; Universidade de A Coruña; A Coruña Spain
2. Department of Internal Medicine; Complejo Hospitalario Universitario A Coruña (CHUAC); SERGAS; A Coruña Spain
3. Miguel Hernández University; Alicante Spain