00393nas a2200145   4500000000100000008004100001100001400042700001400056700001600070700001700086245011500103300000800218490000700226022001400233       2011                            d1 aA. Dregan1 aA. Grieve1 aT. Van Staa1 aM. Gulliford00aPotential application of item-response theory to interpretation of medical codes in electronic patient records  a1680 v11  a1471-2288