“…Kasakura and Lowenstein (1967) and Daniels, Remmers, Sarles, Fish, Cobb, Levin and Ritzmann (1970) reported that the responses of patients' lymphocytes to phytohaemagglutinin (PHA) were normal. When patients' lymphocytes were cultured in autologous serum or plasma, depressed responses were found to PHA (Huber et al, 1969), to allogeneic leucocytes (Elves. Israels and Colling, 1966;Kasakura and Lowenstein, 1967) and to specific antigens (Huber et al, 1969).…”