E Bateman, L Towse, R Dahl, Peter Massey, N Zhong, D Tashkin, N Siafakas, D Pavia
2010-09-30
Aged, Bronchodilator Agents, administration & dosage, adverse effects, Disease Progression, Double-Blind Method, Female, Forced Expiratory Volume, drug effects, physiology, Humans, Male, Patient Compliance, Pulmonary Disease, Chronic Obstructive, drug therapy, mortality, physiopathology, Respiratory Function Tests, Scopolamine Derivatives, Smoking