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:  Immunoglobulins associated with elevated riboflavin binding by plasma from cancer patients .

A: plasma
****
Q:  Although the time to hospital discharge did not differ in the full sample ( 9 . 2 d for both groups ) , it was greater among those receiving cefazolin ( 8 . 6 vs . 8 . 0 d ; p < 0 . 05 ) when patients with lengths of stay exceeding 24 days were excluded from both groups .

A: sample
****
Q:  In our future studies in this population , we will collect larger volumes of serum for dioxin analysis .

A:
serum
****