title: [Series: Clinical study from Japan and its reflections; Hokkaido COPD Cohort Study].
authors.affiliation: Division of Respiratory Medicine, Department of Internal Medicine, Hokkaido University Graduate School of Medicine, Japan.
authors.forename: Masaharu
authors.initials: M
authors.lastname: Nishimura
authors.forename: Hironi
authors.initials: H
authors.lastname: Makita
mesh_terms: D002986:Clinical Trials as Topic; D015331:Cohort Studies; D005500:Follow-Up Studies; D006801:Humans; D007564:Japan; D017410:Practice Guidelines as Topic; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy*; D013997:Time Factors