00454nas a2200169   4500000000100000000000100001008004100002100001700043700001600060700001600076700001200092700001500104245013500119300001000254490000600264022001400270       2009                            d1 aM. Gulliford1 aJ. Charlton1 aM. Ashworth1 aA. Rudd1 aA. Toschke00aSelection of medical diagnostic codes for analysis of electronic patient records. Application to stroke in a primary care database  ae71680 v4  a1932-6203