Correction
The 11th line of the précis in Ernest Hartmann's article "L-Tryptophan: A Rational Hypnotic with Clinical Potential" (134:366-370, 1977), should read, "L-tryptophan, unlike other hypnotics...." Lines 8-11 in the second column of p. 369 should read, "according to personal communications from Alec Coppen, M.D., from Cambrian Chemicals, Ltd., and from the Medicines Council of Great Britain...."