Efficacy of Tiotropium in Patients of African Descent With Chronic Obstructive Pulmonary Disease

Boehringer Ingelheim Investigational Site, Birmingham

Cooper Green Hospital, Birmingham

University of Alabama at Birmingham, Birmingham

David Geffen School of Medicine, Los Angeles

VA Greater Los angeles Health Care Systems, Sepulveda

Boehringer Ingelheim Investigational Site, Waterbury

Yale Univ. Pulmonary and Critical Care Medicine, West Haven

Emerald Coast Research Associates, Panama City

Bay Pines V. A. Medical Center, Saint Petersberg

Louisiana State University School of Medicine, New Orleans

LSU MC-Sheveport, Shreveport

Bronx VA Medical Center, The Bronx

Brody School of Medicine, East Carolina University, Greenville

Boehringer Ingelheim Investigational Site, Philadelphia

Temple University Hospital, Philadelphia

Boehringer Ingelheim Investigational Site, Charleston

Spartanburg Medical Research, Spartanburg

Attention: Amir Sharafkhaneh, M.D., Houston

VAMC Houston, Houston