title: The CODEX index: a collection or digest of laws: a code.
authors.affiliation: Centre for Respiratory Medicine, University College London, Royal Free Hospital, London, England. Electronic address: g.donaldson@ucl.ac.uk.
authors.forename: Gavin C
authors.initials: GC
authors.lastname: Donaldson
authors.affiliation: Centre for Respiratory Medicine, University College London, Royal Free Hospital, London, England.
authors.forename: Jadwiga A
authors.initials: JA
authors.lastname: Wedzicha
mesh_terms: D000402:Airway Obstruction / Q000175:diagnosis*; D004417:Dyspnea / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007297:Inpatients; D008297:Male; D010351:Patient Discharge / Q000639:trends*; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis*; D012720:Severity of Illness Index