PT - JOURNAL ARTICLE AU - Santosh Sanagapalli AU - Rami Sweis TI - Combined pH-impedance testing for reflux: current state of play and future challenges AID - 10.1136/flgastro-2017-100840 DP - 2017 Apr 21 TA - Frontline Gastroenterology PG - flgastro-2017-100840 4099 - http://fg.bmj.com/content/early/2017/04/21/flgastro-2017-100840.short 4100 - http://fg.bmj.com/content/early/2017/04/21/flgastro-2017-100840.full