TY - JOUR AU - Hemmink, G J; Bredenoord, A J; Weusten, B L TI - Esophageal pH-impedance monitoring in patients with therapy-resistant reflux symptoms: “on” or “off” proton pump inhibitor? JO - Am J Gastroenterol IS - 10 VL - 103 PY - 2008 DO - 10.1111/j.1572-0241.2008.02033.x SP - 2446 EP - 2453 N1 - et al. ER -