Clinical gastrointestinal endoscopy /[edited by] Gregory G. Ginsberg ... [et al.]. 

 - 2nd ed. 
 - Philadelphia, PA  Elsevier Saunders  2012 
<br/><br/><label>ISBN: </label>9781437715293 
<br/><br/><label>National Library of Medicine Call No.: </label>WI 141 CLI 2012