The purpose of this study is to determine which dose of the investigational drug is the most safe and effective compared to the control drug.
Inclusion Criteria:
-History of COPD and cigarette smoking
Exclusion Criteria:
Los Angeles, California 90025, United States
Upland, California 91786, United States
Denver, Colorado 80206, United States
Hines, Illinois 60141, United States
Missoula, Montana 59804, United States
Medford, Oregon 97504, United States
Tacoma, Washington 98405, United States