00441nas a2200157   4500000000100000000000100001008004100002100001200043700001300055700001500068700001400083245013600097300001000233490000800243022003200251       2005                            d1 aV. Kiri1 aN. Pride1 aJ. Soriano1 aJ. Vestbo00aInhaled corticosteroids in chronic obstructive pulmonary disease: results from two observational designs free of immortal time bias  a460-40 v172  a1073-449X (Print) 1073-449x