EBV viral load in BL patients and controls. PlasmaEBV viral loads were determined by Q-PCR and the values obtained were log-transformed. (A) The plasma EBV viral loads were significantly higher in BL patients (n = 32) compared to the controls (p < 0.0001), (B) Plasma EBV viral loads were significantly higher in patients presenting with abdominal tumors (n = 16) compared to jaw tumor patients (n = 14) (p < 0.0337). The differences between the two study populations were compared using Mann-Whitney U test. p values of Mann-Whitney U tests are indicated in the figures. Horizontal bars represent median values per each study population.