00416nas a2200133   4500000000100000000000100001008004100002100002200043700001300065245017200078300001100250490000700261022001400268       2011                            d1 aR. DiSantostefano1 aK. Davis00aPrescription patterns in asthma patients initiating salmeterol in UK general practice: a retrospective cohort study using the General Practice Research Database (GPRD)  a511-200 v34  a0114-5916