title: Invited commentary.
authors.affiliation: Indiana University School of Medicine, Indianapolis, Indiana, USA.
authors.forename: Samer G
authors.initials: SG
authors.lastname: Mattar
mesh_terms: D003906:Developing Countries / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D008297:Male; D009767:Obesity, Morbid / Q000453:epidemiology* / Q000208:ethnology / Q000209:etiology