IL6 and cancer: Stage of cancer progression at the time of the study did not seem to affect intensity of serum IL-6 levels (8.1±1.3pg/ml, 4.21±2.85 pg/ml, and 7.25±3.35 pg/ml for Stage 1 (n=3), Stage 2 (n=8) and Stage 3 (n=6), respectively; P<0.67).