“…The role of antimucosal antibodies is uncertain, since these may be secondary to ulceration, and are detectable in aphthous ulceration with no other stigmata of Behret's disease (Lehner, 1964(Lehner, , 1967O'Duffy, Carney and Deodhar, 1971). In contrast, Dolby (1972) (Mamo and Azzam, 1970;Rosselet, Saundan and Zenklusen, 1968) while other workers have been less impressed (Wong, 1969). Haim and Sherf (1966) reported a transient favourable response to transfusion of fresh blood or plasma, and O' Duffy et al (1971) were also impressed by this effect: we did not note any such response to blood transfusion in our patients,'but blood was given only as indicated and no trial of this therapy was undertaken.…”