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Measurement of esophageal reflux by scintigraphy.
Velasco N, Pope CE 2nd, Gannan RM, Roberts P, Hill LD. Velasco N, et al. Among authors: gannan rm. Dig Dis Sci. 1984 Nov;29(11):977-82. doi: 10.1007/BF01311246. Dig Dis Sci. 1984. PMID: 6489090
Endoscopic retrograde biliary drainage.
Marks WM, Freeny PC, Ball TJ, Gannan RM. Marks WM, et al. Among authors: gannan rm. Radiology. 1984 Aug;152(2):357-60. doi: 10.1148/radiology.152.2.6739799. Radiology. 1984. PMID: 6739799