Cytomegalovirus is frequently reactivated and disappears without antiviral agents in ulcerative colitis patients

Katsuyoshi Matsuoka, Yasushi Iwao, Takeshi Mori, Atsushi Sakuraba, Tomoharu Yajima, Tadakazu Hisamatsu, Susumu Okamoto, Yuichi Morohoshi, Motoko Izumiya, Hitoshi Ichikawa, Toshiro Sato, Nagamu Inoue, Haruhiko Ogata, Toshifumi Hibi