the monoamine metabolites ( mam ) homovanillic acid ( hva ) , 5-hydroxy-indoleacetic acid ( 5-hiaa ) , 4-hydroxy-3-methoxy-phenylglycol ( hmpg ) and the amino acids tyrosine , tryptophan , glutamate and glutamine were measured in serum before treatment and once a week during treatment .
C0002520
amino acids
C0017797
glutamine