00600nas a2200193   4500000000100000008004100001100001300042700001200055700001600067700001500083700001600098700001300114700001600127700001400143245022200157300000700379490000600386022001400392       2003                            d1 aI. Carey1 aD. Cook1 aS. De Wilde1 aS. Bremner1 aN. Richards1 aS. Caine1 aD. Strachan1 aS. Hilton00aImplications of the problem orientated medical record (POMR) for research using electronic GP databases: a comparison of the Doctors Independent Network Database (DIN) and the General Practice Research Database (GPRD)  a140 v4  a1471-2296