The Appendix on page 219 of the article that appears in the March/April 2008 issue of Nursing Research, was printed incorrectly; shaded columns F and J were deleted erroneously. With the correct missing columns inserted, the Microsoft Excel Program Shell equations calculate appropriately. Below is the corrected Microsoft Excel Program Shell from the article, example of the Microsoft Excel worksheet, and related calculation results. The examples focus on Prior 1 and the computations are consistent with the article.

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