1 Department of Preventive Medicine & Public Health, University of Santiago de Compostela, Santiago de Compostela, A Coruña, Spain; Consortium for Biomedical Research in Epidemiology & Public Health (CIBER en Epidemiología y Salud Pública - CIBERESP), Spain; Preventive Medicine and Public Health Unit, Monforte de Lemos Local Hospital, Monforte de Lemos (Lugo), Spain. Electronic address: alberto.ruano@usc.es.
2 CLINURSID, University of Santiago de Compostela, Santiago de Compostela (A Coruña), Spain; Department of Internal Medicine, Hospital of Santiago de Compostela, Santiago de Compostela (A Coruña), Spain.