SAN ANTONIO – A dentist in Bandera County discovered two of her patients had human papillomavirus infection, or HPV, through a simple test. The HPV discovery was part of a national study UT Health San Antonio is participating in. Dr. Risé Martin joined the study on HPV, which is a common sexually-transmitted infection that can lead to cancer. The HPV study was headed by the National Dental Practice-Based Research Network. Director of the Southwest Region, Cochran said UT Health San Antonio has been involved in the network since 2012.