Task: Named Entity Recognition
Input (English):  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 ) .
Output (English): serum