Quan, Samuel <br/><br/>
Upper gastrointestinal bleeding due to peptic ulcer disease is not associated with air pollution: a case-crossover study.  [electronic resource] 

 -  BMC gastroenterology  Oct 2015 
 - 131 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>1471-230X 
<br/><br/><label>Standard No.: </label>10.1186/s12876-015-0363-6  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aged<br/>Aged, 80 and over<br/>Air Pollutants--analysis<br/>Air Pollution--adverse effects<br/>Alberta<br/>Carbon Monoxide--analysis<br/>Case-Control Studies<br/>Cross-Over Studies<br/>Environmental Monitoring--methods<br/>Female<br/>Humans<br/>Logistic Models<br/>Male<br/>Middle Aged<br/>Nitrogen Oxides--analysis<br/>Odds Ratio<br/>Ozone--analysis<br/>Particulate Matter--analysis<br/>Peptic Ulcer--chemically induced<br/>Peptic Ulcer Hemorrhage--etiology<br/>Risk Factors<br/>Sulfur Dioxide--analysis<br/>Upper Gastrointestinal Tract--drug effects