PHILADELPHIA (Reuters) - The Internet has played a significant role in the latest increase in cases of syphilis among gay men by introducing partners more likely to practice high-risk sex, according to a study released on Wednesday. About 22 percent of homosexual men diagnosed with early stage syphilis reported meeting one or more of their sexual partners through the Internet around the time they were infected, said the study by the Los Angeles Health Department. Researchers at a national conference in Philadelphia on the prevention of sexually transmitted diseases also said they found gays who used the Web to meet...