1. Faculty of Health Sciences, University of Valladolid, 42004 Soria, Spain
2. Clinical Research in Health Sciences Group, University of Valladolid, 42004 Soria, Spain
3. Ólvega Primary Care Health Center (Soria, Spain), Soria Health Care Management, Castilla y León Regional Health Management (SACYL), 47007 Valladolid, Spain