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. 2009 Nov 12;4:52. doi: 10.1186/1748-717X-4-52

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Copyright ©2009 Li et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Volume-response or dose-response relationship for the average probability of having prolonged GT dependence and the volume of the IPC receiving more than 6500 cGy (A), or 6000 cGy (B), or the mean dose to the IPC (C), or maximum dose to CPI (D). GT = gastrostomy tube; IPC = inferior pharyngeal constrictors; CPI = cricoid pharyngeal inlet. The ◇ lines plot the mean risk; the - lines plot the estimated upper and lower limits of 95% confidence interval. The ♦ points depict the observed values.