Unge G, Malmgren R, Olsson P, Theorell H, Tornling G. Effects of dietary-protein tryptophan restriction upon 5-HT uptake by platelets and clinical symptoms in migraine-like headache. Cephalalgia 1983;3:213-218.
Kallos P, Kallos-Deffner L. Allergy and migraine. Int Arch Allergy 1955;7:367-372.