00350nas a2200145   4500000000100000008004100001100001200042700001400054700001400068700001200082245008300094300000600177490000700183022001400190       2010                            d1 aN. Khan1 aR. Perera1 aS. Harper1 aP. Rose00aAdaptation and validation of the Charlson Index for Read/OXMIS coded databases  a10 v11  a1471-2296