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Agrawal, A; Roberts, J; Sharma, N; Tutuian, R; Vela, M; Castell, D O (2009). Symptoms with acid and nonacid reflux may be produced by different mechanisms. Diseases of the esophagus, 22(5), pp. 467-70. Carlton South (Aus.): Blackwell Asia 10.1111/j.1442-2050.2009.00940.x
