Detailed Instructions: 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.
Problem: This study aimed at correlating cardiac findings ( valvular and myocardial calcification , myocardial hypertrophy ) with clinical data ( age , sex , clinical manifestation , nephrolithiasis , nephrocalcinosis , hypertension , skeletal abnormalities , hypercalcemic syndrome ) and biochemical data ( serum calcium , serum phosphate , serum iPTH level , serum creatinine ) .
Solution:
serum