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Effect of positional separation of the pH electrodes on the reported number of reflux events (22 subjects, raw data). Position 0 is the location of the Bravo pH electrode. Variations in electrode position within the 4–10 cm range above the squamocolumnar junction domain of the oesophagus did not systematically affect the number of reflux events reported (r = 0.01, p>0.05).
