Prevalence of knee symptoms and radiographic and symptomatic knee osteoarthritis in African Americans and Caucasians: the Johnston County Osteoarthritis Project.
Joanne Jordan, Charles Helmick, Jordan Renner, Gheorghe Luta, Anca Dragomir, Janice Woodard, Fang Fang, Todd Schwartz, Lauren Abbate, Leigh Callahan, William Kalsbeek, Marc Hochberg2007 JanTijdschriftartikel