[1] Univ N Carolina, Osteoarthrit Act Alliance, Thurston Arthrit Res Ctr, 3300 Thurston Bldg,CB 7280, Chapel Hill, NC 27599 USA
[2] Campbell Univ, Coll Pharm & Hlth Sci, POB 1090,234 JP Riddle Bldg, Buies Creek, NC 27506 USA
[3] Univ N Carolina, Dept Med, Chapel Hill, NC 27515 USA
[4] Univ N Carolina, Dept Orthopaed, Chapel Hill, NC 27515 USA
[5] Univ N Carolina, Dept Social Med, Chapel Hill, NC 27515 USA
[6] Univ N Carolina, Dept Epidemiol, Gillings Sch Global Publ Hlth, Chapel Hill, NC 27515 USA