Hazard ratios and survival probabilities of the patient groups , segregated by clinical stage ( T1-2N0-1M0 , T3-4N0-1M0 , T1-2N2-3M0 , and T3-4N2-3M0 ) and EBV DNA load ( low or high ) alone , and also according to hs-CRP level ( low or high ) , were compared .