Losina, Elena, Rochelle P. Walensky, William M. Reichmann, Holly L. Holt, Hanna Gerlovin, Daniel H. Solomon, Joanne M. Jordan, David J. Hunter, Lisa G. Suter, Alexander M. Weinstein et al. "Impact of obesity and knee osteoarthritis on morbidity and mortality in older Americans." Annals of internal medicine 154, no. 4 (2011): 217-26.