Research/Clinical Trial Information Upcoming Studies:   LOTT Trial (COPD) Washington University trial. Looking for patients with Chronic Obstructive Pulmonary Disease (COPD) needing supplemental oxygen therapy with sleep or exercise. At least 40 years old. 10 years cigarette history. Must have Medicare insurance willing to pay cost of oxygen. Patients will be seen in clinic once per year, and via telephone every 4 months. Please contact Linda at email: ltilme@gcrmweb.com for further details