“…We are unable to explain by coincidence alone the benign course of several of our cases treated with penicillin. This is in contradiction to the conclusions of Watson et al (1944), Herrel and Kennedy (1944), and Foster et al (1944; the last-named author believes even in a deleterious effect of penicillin. The number of cases reported by these authors seems to us too small for a definite conclusion.…”