[1] Brigham & Womens Hosp, Boston, MA 02115 USA
[2] Stanford Univ, Med Ctr, Palo Alto, CA 94304 USA
[3] Univ Alabama, Birmingham, AL USA
[4] Johns Hopkins Univ, Baltimore, MD USA
[5] Ctr Rheumatol, Albany, NY USA
[6] St Paul Med Ctr, Dallas, TX USA
[7] Denver Arthrit Ctr, Denver, CO USA
[8] Amgen Inc, Thousand Oaks, CA USA