Authors: Charles G Helmick; David T Felson; Reva C Lawrence; Sherine Gabriel; Rosemarie Hirsch; C Kent Kwoh; Matthew H Liang; Hilal Maradit Kremers; Maureen D Mayes; Peter A Merkel; Stanley R Pillemer; John D Reveille; John H Stone Journal: Arthritis Rheum Date: 2008-01