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→Circumcision and HPV
| date=May 2007
| accessdate=2008-09-18
}}.</ref>.
Most studies on HPV performed before 2006 had poor controls and relatively small study groups. In order to clear up this confusion, a recent 2008 study on HPV had an enormous study group of almost nine thousand men in the United States. This is currently the largest study on circumcision and HPV ever performed in the U.S. And since the study was performed in the U.S., the results are directly applicable to people who live in the U.S. The study concluded: