Myth of the pure obsessional type in obsessive--compulsive disorder. - Williams MT; Farris SG; Turkheimer E; Pinto A; Ozanick K; Franklin ME; Liebowitz M; Simpson HB; Foa EB; Williams, Monnica T; Farris, Samantha G; Turkheimer, Eric; et al. (Depression & Anxiety (1091-4269), 2011)