International Center for the Assessment of Nutritional Status, Department of Food, Environmental and Nutritional Sciences, University of Milan, Milan, Italy. Department of Preventive Medicine and Public Health, School of Medicine, University of Navarra, Pamplona, Spain. Physiopathology of Obesity and Nutrition Networking Biomedical Research Centre (CIBERobn), Spanish National Institute of Health Carlos III, Madrid, Spain. Navarra's Health Research Institute, Pamplona, Spain. Department of Nutrition, TH Chan School of Public Health, Harvard University, Boston, MA, USA. Dermatology & Venereology Department, "Madrid Salud" Regional Healthcare Agency, Madrid City Council, Madrid, Spain. Department of Medical Oncology, University of Navarra Clinic, Pamplona, Spain. Department of Endocrine and Metabolic Diseases, Obesity Unit and Laboratory of Nutrition and Obesity Research, IRCCS (Scientific Institute for Research, Hospitalization, and Healthcare) Italian Auxologic Institute (IAI), Milan, Italy.