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Dear user, the section you removed from Indiana University School of Dentistry was properly cited and referenced, however, the links were out of date. I replaced them with updated links, see here and here as well as another. The Associated Press is a 100% valid reference source, as is KMGH channel 7 news in Denver. I've removed the old invalid URLs, and replaced them with the AP links. Hope that helps! Ariel♥Gold "