Actually they are doing clinical trials for that where I live...my pulmonologist is involved. Unfortunately I did not meet the criteria because I had the valves inserted. Yes! I do have Bronchitis as well with the COPD...that's whats killing me! On top of all that about 10 days post valve placement I developed unexplained vertigo and have been playing patty-cake with ENT and Neuro (if you can get an appt) for 8 months now. Unfortunately, I am a well-seasoned Nurse who has been a Director of Nurses for over 20 years and so very frustrated at the lack of access to good quality care. I know I must sound crazy but I'm not. You can see why I am seeking medical attention elsewhere! You are too kind to listen. Thank you!