1. Psychological Stress Increases Risk for Peptic Ulcer, Regardless of Helicobacter pylori Infection or Use of Nonsteroidal Anti-inflammatory Drugs 
Susan Levenstein, Steffen Rosenstock, Rikke Kart Jacobsen, Torben Jorgensen 
Clinical Gastroenterology and Hepatology 
Volume 13, Issue 3, Pages e1 (March 2015)
DOI: /j.cgh
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2. Figure 1 Flow chart of enrollment, procedures, and outcomes.
Clinical Gastroenterology and Hepatology  , e1DOI: ( /j.cgh )
Copyright © 2015 AGA Institute Terms and Conditions