Chronic Obstructive Lung Disease

• John Muir Health — Concord, California, United States
• Sharp Memorial Hospital — San Diego, California, United States
• McKay-Dee Hospital Center — Ogden, Utah, United States

• Allegheny General Hospital — Pittsburgh, Pennsylvania, United States

Not specified

• Centre for Studies in Primary Care — Kingston, Ontario, Canada

• Rigshospitalet — Copenhagen N, Denmark

• Tufts Medical Center — Boston, Massachusetts, United States

• Dept of Respiratory Medcine & Allergology, Skane University Hospital — Lund, Sweden

• Dept. of Pulmonary Medicine — Copenhagen NV, Capital Region, Denmark

• The Ottawa Hospital Rehabilitation Centre — Ottawa, Ontario, Canada

• VA Boston Healthcare System — Boston, Massachusetts, United States