title: Inhaled glucocorticoids in COPD: immortal time bias.
authors.forename: Neil B
authors.initials: NB
authors.lastname: Pride
authors.forename: Jorgen
authors.initials: J
authors.lastname: Vestbo
authors.forename: Joan B
authors.initials: JB
authors.lastname: Soriano
authors.forename: Victor A
authors.initials: VA
authors.lastname: Kiri
mesh_terms: D000280:Administration, Inhalation; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage*; D015982:Bias; D005938:Glucocorticoids / Q000008:administration & dosage*; D006801:Humans; D010359:Patient Readmission / Q000706:statistics & numerical data; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy* / Q000401:mortality; D012107:Research Design / Q000592:standards*; D013256:Steroids; D016019:Survival Analysis; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D000893:Anti-Inflammatory Agents; D005938:Glucocorticoids; D013256:Steroids