[1] UNIV COPENHAGEN, HVIDOVRE HOSP, DEPT RHEUMATOL, COPENHAGEN, DENMARK
[2] UNIV COPENHAGEN, HVIDOVRE HOSP, DEPT CLIN PHYSIOL, COPENHAGEN, DENMARK
[3] UNIV COPENHAGEN, HVIDOVRE HOSP, DEPT PATHOL, COPENHAGEN, DENMARK
[4] UNIV COPENHAGEN, HVIDOVRE HOSP, DEPT MED GASTROENTEROL, COPENHAGEN, DENMARK
[5] UNIV CALIF SAN DIEGO, DEPT BIOL, LA JOLLA, CA 92093 USA