IL37 and ovarian cancer: In contrast, a statistically significant correlation between serum and peritoneal fluid levels in ovarian cancer patients was not found for IL-37 (p>0.05; r=0.32), IL-36β (p>0.05; r=-0.03), IL-36γ (p>0.05; r=0.25), IL-36Ra (p>0.05; r=-0.03) and IL-38 (p>0.05; r=-0.27).