@article{article78c89879,
title   = {Trends of obesity and underweight in older children and adolescents in the United States, Brazil, China, and Russia},
author = {Wang, Youfa and Monteiro, Carlos Augusto and Popkin, Barry M.},
year = {2002},
doi = {10.1093/ajcn/75.6.971},
journal   = {American Journal of Clinical Nutrition}
}