Kroon, H.M.

study patient exercise disease group association arthritis follow-up baseline fracture level osteoarthritis garp study control change damage score allele result shape joint subject acromegaly table analysis activity difference tibiofemoral month cartilage susceptibility sibling linkage muscle strength university rapit effect rheum disease activity value rotterdam characteristic factor erasmus university rotterdam follow-up study serum women exercise group tibiofemoral angle strength signi haplotype spine prevalence sibling pairs muscle angle 18 months population larsen bone mineral density analyses knee oa alignment frequency rapit study netherland journal radiographic department ability hip oa leiden duration radiograph rs 225014 3 months participant endocrinology research