[1] KAROLINSKA INST,S-10401 STOCKHOLM 60,SWEDEN
[2] UNIV TROMSO,DEPT RHEUMATOL,N-9001 TROMSO,NORWAY
[3] SK&F LABS,PHILADELPHIA,PA 19101
[4] DIAKONHJEMMETS HOSP,OSLO CITY DEPT RHEUMATOL,OSLO,NORWAY
[5] NATL UNIV HOSP OSLO,RIKSHOSP,INST CLIN BIOCHEM,OSLO,NORWAY