[1] Univ Navarra Clin, Metab Res Lab, Pamplona, Spain
[2] Inst Salud Carlos III, CIBER Fisiopatol Obesidad & Nutr, Barcelona, Spain
[3] Inst Invest Sanitaria Navarra IdiSNA, Obes & Adipobiol Grp, Pamplona, Spain
[4] Univ Navarra Clin, Dept Anesthesia, Pamplona, Spain
[5] Univ Navarra Clin, Dept Surg, Pamplona, Spain
[6] Univ Navarra Clin, Dept Endocrinol & Nutr, Pamplona, Spain