Authors: Joanne M Jordan; Charles G Helmick; Jordan B Renner; Gheorghe Luta; Anca D Dragomir; Janice Woodard; Fang Fang; Todd A Schwartz; Amanda E Nelson; Lauren M Abbate; Leigh F Callahan; William D Kalsbeek; Marc C Hochberg Journal: J Rheumatol Date: 2009-03-13 Impact factor: 4.666