Changes in forced expiratory volume in 1 second over time in COPD

Jørgen Vestbo, Lisa D Edwards, Paul D Scanlon, Julie C Yates, Alvar Agusti, Per Bakke, Peter M A Calverley, Bartolome Celli, Harvey O Coxson, Courtney Crim, David A Lomas, William MacNee, Bruce E Miller, Edwin K Silverman, Ruth Tal-Singer, Emiel Wouters, Stephen I Rennard, ECLIPSE Investigators