Correlation between IL-10 levels in saliva and mucositis. IL-10 levels were assessed with Milliplex with concentrations corrected for wet weight of the collecting sponge. IL-10 levels at 10 Gy and 30 Gy were normalized to baseline for all patients. Patients with Grade 2 or higher mucositis had a higher relative IL-10 concentration compared to those with Grade 0 or 1 mucositis. G: grade, bars: mean, error bars: SD.