1. Department of Preventive Medicine, Lozano Blesa University Clinical Hospital of Zaragoza, Zaragoza, Spain
2. Primary Care Department, Health-care Centre Jose Ramón Muñoz, Zaragoza, Spain
3. Emergency Department, Miguel Servet University Hospital of Zaragoza, Zaragoza, Spain
4. Department of Preventive Medicine, Miguel Servet University Hospital of Zaragoza, Zaragoza, Spain