1 Department of Preventive Medicine and Public Health, School of Medicine, University of Navarra, Spain; Institute for Culture and Society, University of Navarra, Spain; Navarra Institute for Health Research, Pamplona, Spain. Electronic address: cldelburgo@unav.es.
2 Department of Preventive Medicine and Public Health, School of Medicine, University of Navarra, Spain; Institute for Culture and Society, University of Navarra, Spain; Navarra Institute for Health Research, Pamplona, Spain.