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Copyright ©The Author(s) 2015.
World J Respirol. Mar 28, 2015; 5(1): 28-33
Published online Mar 28, 2015. doi: 10.5320/wjr.v5.i1.28
Figure 1
Figure 1 Sphincter mechanisms at the lower end of the esophagus[9]. This figure is reprinted with permission through the Massachusetts Medical Society, Copyright © 1997.