CORRESPONDENCE| Volume 20, ISSUE 4, P361, October 2011

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Published:August 16, 2011DOI:
      Drs. Campbell and Yentis are to be congratulated on their keen eye and attention to the finest detail. We simply missed this classic example of the ‘Double R’ where the angle is calculated from the start of the run instead of the split point, resulting in an angle measurement that is lower than it should be. The dark line as is shown in their figure is the early calculation with the resultant angle ‘a’, whereas the appropriate angle is ‘b’ as is shown in their diagram.
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