blood levels of serotonin ( 5-ht ) and urinary excretion of 5-hydroxyindole-acetic acid ( 5-hiaa ) , tryptamine ( t ) , and indole-acetic acid ( iaa ) were determined in 39 cases of systemic scleroderma and in 7 cases of very severe cutaneous scleroderma .
C0036421
systemic scleroderma
C0011644
scleroderma