Pellegrini CA, Song J, Chang RW, Semanik PA, Lee J, Ehrlich-Jones L, Pinto D, Dunlop DD. Change in Physical Activity and Sedentary Time Associated With 2-Year Weight Loss in Obese Adults With Osteoarthritis. J Phys Act Health. 2016 May;13(5):461- 6. doi: 10.1123/jpah.2015-0404. Epub 2015 Nov 6. PubMed PMID: 26552064; PubMed Central PMCID: PMC5144152.