In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.

[EX Q]:  Colorimetrical rate assay for urinary dipeptidyl peptidase IV ( DPPIV ) activity using a new substrate .
[EX A]: urinary

[EX Q]:  In one of the few studies on dioxin - like compounds in which children were included , Eskenazi and coworkers [ 36 ] evaluated the relationship between serum TCDD concentrations and age at exposure of female residents of Seveso , Italy .
[EX A]: serum

[EX Q]:  Differences between pigs of the innervated and denervated groups were not apparent , with respect to blood flow to any other region ( caudate region , brain stem , cerebellum ) .
[EX A]:
blood