TYAGI S.K.  <br/><br/>
INDIAN JOU. OF GASTRO ENTROLOGY 

 -  SPRINGER  2018 
 - 277  1-3SUP 
 -  37 .
<br/><br/><label>ISSN: </label>2548860 
<br/><br/><label>Dewey Class. No.: </label>617