1 Osteoarthritis Action Alliance, Thurston Arthritis Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC, USA. Electronic address: kambrose@unc.edu.
2 Osteoarthritis Action Alliance, Thurston Arthritis Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC, USA.
3 Division of Population Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA, USA.