Observational Study
Copyright ©The Author(s) 2016.
World J Gastroenterol. Apr 14, 2016; 22(14): 3845-3851
Published online Apr 14, 2016. doi: 10.3748/wjg.v22.i14.3845
Figure 2
Figure 2 Categorization of patients by means of pH/impedance and proton-pump inhibitor test. PPI: Proton-pump inhibitor; FH: Functional heartburn; NERD: Non-erosive reflux disease.