Fig. 1. The prevalence of heartburn and acid regurgitation symptoms in patients with positive and negative 24-hour pH monitoring: a comparison of the 2 studies from Asia (A, Thailand)62 and Europe (B, German).61

J Neurogastroenterol Motil 2010;16:131~138 https://doi.org/10.5056/jnm.2010.16.2.131

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