Clinical characteristics and treatment response of a possible self-contamination subtype of obsessive-compulsive disorder: a prospective investigation. - Mukai, Keiichiro; Yamanishi, Kyosuke; Hosoi, Yukihiko; Sakurai, Masahiko; Ogino, Shun; Maebayashi, Kensei; Hayashida, Kazuhisa; Matsunaga, Hisato (BMC Psychiatry, 2025)