Johnston, D W <br/><br/>
Annular pancreas: a new classification and clinical observations.  [electronic resource] 

 -  Canadian journal of surgery. Journal canadien de chirurgie  May 1978 
 - 241-4 p.  digital 
<br/><br/> Publication Type: Case Reports; Journal Article 
<br/><br/><label>ISSN: </label>0008-428X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aged<br/>Classification<br/>Duodenal Ulcer--etiology<br/>Gastrointestinal Diseases--etiology<br/>Humans<br/>Infant, Newborn<br/>Middle Aged<br/>Pancreas--abnormalities