title: Ratio of plasma tryptophan to five other amino acids in depressed subjects: a follow-up.
mesh_terms: D000596:Amino Acids / Q000097:blood*; D003866:Depressive Disorder / Q000097:blood* / Q000523:psychology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D014364:Tryptophan / Q000097:blood*
chemical_list: D000596:Amino Acids; D014364:Tryptophan