The natural history of ankylosing spondylitis: is the disease really changing?
Fries
J F
JF
Department of Medicine, Stanford University School of Medicine, CA 94305.
Singh
G
G
Bloch
D A
DA
Calin
A
A
D015331:Cohort Studies; D003430:Cross-Sectional Studies; D006801:Humans; D012107:Research Design / Q000592:standards*; D013167:Spondylitis, Ankylosing / Q000503:physiopathology*