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.

[Q]: In our study , although distance from the Khimprom plants was a weak predictor of serum dioxin - like compounds , consumption of local foods ( specifically meat and fish ) , as in the Seveso study , was a strong predictor of sum of dioxin - like compounds and dioxin TEQs .
[A]: serum

[Q]: QTcF interval versus plasma linezolid concentrations .
[A]: plasma

[Q]: On the contrary , the administration of 5 - CT induces a rise in IOP , which is partly or entirely caused by an increase in aqueous humor secretion mediated by 5 - HT7 receptors [ 84 ] .
[A]:
humor