PTCChallenge.com

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IMPORTANT: Beginning with the August 2011 issue of PTCChallenge.com, our web site reflects a new organization of its content. Links or bookmarks that were created or saved prior to August 2011 will not retrieve the information that they previously did. If you have arrived at this page after using a link or bookmark that predates the August 2011 issue, please use the Archives search tool at PTCChallenge.com to locate the article or information you desire. We apologize for this inconvenience, and appreciate your patience as PTCChallenge.com settles into a more efficient and effective framework to serve our readers.

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