1 Department of Preventive Medicine and Public Health, University of Navarra, Pamplona, Spain; CIBERObn, Carlos III Health Institute, Madrid, Spain; Department of Nutrition, Harvard University T H Chan School of Public Health, Boston, MA; IdiSNA, Pamplona, Spain. Electronic address: mamartinez@unav.es.
2 Department of Preventive Medicine and Public Health, University of Navarra, Pamplona, Spain; CIBERObn, Carlos III Health Institute, Madrid, Spain; IdiSNA, Pamplona, Spain.