1. Impact of COPD on Outcome Among Patients With Complicated Peptic Ulcer
Steffen Christensen, MD, Reimar W. Thomsen, MD, PhD, Marie Louise Tørring, MA, Anders Riis, MSc, Mette Nørgaard, MD, PhD, Henrik T. Sørensen, MD, DMSc 
CHEST 
Volume 133, Issue 6, Pages (June 2008)
DOI: /chest
Copyright © 2008 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Unadjusted survival curves for patients with COPD and without COPD hospitalized for perforated peptic ulcers (top) and bleeding peptic ulcers (bottom).
CHEST  , DOI: ( /chest )
Copyright © 2008 The American College of Chest Physicians Terms and Conditions