40
Participants
Start Date
February 28, 2005
Primary Completion Date
September 30, 2010
Study Completion Date
September 30, 2010
Oxygen
4 liters of oxygen a minute
Air from a placebo oxygen delivery
4 liters a minute of air from a placebo device
Dept of respiratory medicine, Umeå
Swedish Heart Lung Foundation
OTHER
Umeå University
OTHER