00511nas a2200193   4500000000100000000000100001008004100002100001400043700001400057700001500071700001500086700001700101700001300118700001300131245012500144300000900269490000700278022003200285       2007                            d1 aK. Jordan1 aA. Clarke1 aD. Symmons1 aD. Fleming1 aM. Porcheret1 aU. Kadam1 aP. Croft00aMeasuring disease prevalence: a comparison of musculoskeletal disease using four general practice consultation databases  a7-140 v57  a0960-1643 (Print) 0960-1643