[1] UNIV TORONTO,TORONTO M5S 1A8,ONTARIO,CANADA
[2] NIAMS,ARTHRITIS & RHEUMATISM BRANCH,BETHESDA,MD 20892
[3] STANFORD UNIV,DEPT MICROBIOL & IMMUNOL,STANFORD,CA 94305
[4] NATL UNIV IRELAND UNIV COLL CORK,DEPT RHEUMATOL,CORK,IRELAND
[5] CASE WESTERN RESERVE UNIV,DEPT RHEUMATOL,CLEVELAND,OH 44106
[6] UNIV UTAH,DEPT HUMAN GENET,SALT LAKE CITY,UT 84112