patients with fibrositis syndrome exhibited significantly lower levels of total serum tryptophan ( p = 0.002 ) , as well as 6 other amino acids : alanine ( p less than 0.0005 ) , histidine ( p = 0.001 ) , lysine ( p = 0.02 ) , proline ( p = 0.039 ) , serine ( p = 0.028 ) , and threonine ( p = 0.013 ) .
C0002520
amino acids
C0001898
alanine