title: Clinical trials in idiopathic pulmonary fibrosis: a word of caution concerning choice of outcome measures.
authors.forename: W C
authors.initials: WC
authors.lastname: Johnson
authors.forename: G
authors.initials: G
authors.lastname: Raghu
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D015994:Incidence; D017063:Outcome Assessment, Health Care / Q000379:methods*; D011379:Prognosis; D011658:Pulmonary Fibrosis / Q000175:diagnosis* / Q000453:epidemiology* / Q000628:therapy; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D016896:Treatment Outcome