Differences of Patients with COPD in Two Major Provinces

1. University of Health Sciences, İzmir Suat Seren Chest Diseases and Surgery Training and Research Hospital, İzmir, Turkey

2. University of Health Sciences, İstanbul Yedikule Chest Diseases and Surgery Training and Research Hospital, İstanbul, Turkey

3. Department of Biostatistic, İstanbul University School of Medicine, İstanbul, Turkey