title: Methodological issues in therapeutic trials of COPD.
authors.forename: P
authors.initials: P
authors.lastname: Kardos
mesh_terms: D000280:Administration, Inhalation; D000305:Adrenal Cortex Hormones / Q000008:administration & dosage*; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage*; D001993:Bronchodilator Agents / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy*; D016032:Randomized Controlled Trials as Topic / Q000379:methods; D012107:Research Design
chemical_list: D000305:Adrenal Cortex Hormones; D000893:Anti-Inflammatory Agents; D001993:Bronchodilator Agents