Changes in HPV16/18 Prevalence among Unvaccinated Women with Cervical Intraepithelial Neoplasia in Japan: Assessment of Herd Effects following the HPV Vaccination Program oleh Mamiko Onuki, Kasumi Yamamoto, Hideaki Yahata, Hiroyuki Kanao, Koji Horie, Katsuyuki Konnai, Ai Nio, Kazuhiro Takehara, Shoji Kamiura, Naotake Tsuda, Yuji Takei, Shogo Shigeta, Hidekatsu Nakai, Hiroyuki Yoshida, Takeshi Motohara, Tatsuya Kato, Keiichiro Nakamura, Junzo Hamanishi, Nobutaka Tasaka, Mitsuya Ishikawa, Nobuhiro Kado, Yusuke Taira, Mayuyo Mori, Takashi Iwata, Fumiaki Takahashi, Iwao Kukimoto, Hiroyuki Yoshikawa, Nobuo Yaegashi, Koji Matsumoto, for the MINT Study Group