00447nas a2200169   4500000000100000000000100001008004100002100001600043700001200059700001200071700001400083700001600097245013300113300001000246490000700256022001400263       2016                            d1 aE. Shephard1 aR. Neal1 aP. Rose1 aF. Walter1 aW. Hamilton00aSymptoms of adult chronic and acute leukaemia before diagnosis: large primary care case-control studies using electronic records  a182-80 v66  a0960-1643