title: Specificity of a low free serum histidine concentration for rheumatoid arthritis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001172:Arthritis, Rheumatoid / Q000097:blood*; D005260:Female; D006639:Histidine / Q000097:blood*; D006801:Humans; D008297:Male; D011247:Pregnancy; D012737:Sex Factors
chemical_list: D006639:Histidine