PATRICK CHEIN <br/><br/>
AN INT. JOU. OF OBSTERICS AND  GYNECOLOGY  

 -  BJOG  2017 
 - 711-1290  5-8 
 -  124 .
<br/><br/><label>ISSN: </label>14700328 
<br/><br/><label>Dewey Class. No.: </label>618