TY - JOUR AU - El-Serag, H; Becher, A; Jones, R TI - Systematic review: persistent reflux symptoms on proton pump inhibitor therapy in primary care and community studies JO - Aliment Pharmacol Ther VL - 32 PY - 2010 DO - 10.1111/j.1365-2036.2010.04406.x SP - 720 EP - 737 ER -