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Copyright ©The Author(s) 2015.
World J Gastroenterol. Jan 14, 2015; 21(2): 423-431
Published online Jan 14, 2015. doi: 10.3748/wjg.v21.i2.423
Figure 1
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Figure 1 Levels I and II (A), level II (tumor distal margin above levator ani muscle insertion) (B).
Figure 2
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Figure 2 Level III (tumor distal margin at the level of levator ani insertion) (A), Level III (B).
Figure 3
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Figure 3 Level IV (tumor distal margin below levator ani insertion).
Figure 4
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Figure 4 All tumor levels.