TY - RPRT TI - Construct validity of instruments measuring impairments in body structures and function in rheumatic disorders: which constructs are selected for validation? A systematic review. AU - R A H M Swinkels AU - L M Bouter AU - R A B Oostendorp AU - I J C M Swinkels-Meewisse AU - P U Dijkstra AU - H C W de Vet UR - https://pubmed.ncbi.nlm.nih.gov/16539827/ ID - 16539827 ER -