Effect of Switching From Cigarette Smoking to THS on Disease Progression in Mild to Moderate COPD Subjects With Chronic Bronchitis Symptoms.

Stopped The study team decided to terminate the study due to operational infeasibility caused by challenges with recruiting the necessary number of participants.

Conditions

• COPD
• Smoking
• Tobacco Use

Interventions

• OTHER: THS use
• OTHER: Cigarette
• OTHER: Smoking Abstinence

Sponsor

Philip Morris Products S.A.