Tryptophan intake and national character.
Lester
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Psychology Program, Stockton State College, Pomona, NJ 08240-9988.
D001007:Anxiety / Q000523:psychology*; D003431:Cross-Cultural Comparison; D005120:Extraversion, Psychological; D006801:Humans; D012307:Risk Factors; D013405:Suicide / Q000523:psychology*; D014364:Tryptophan / Q000008:administration & dosage*
D014364:Tryptophan