6. No major organ dysfunction and laboratory indicators should meet the following requirements: absolute neutrophil count > 1.5*10^9/L, platelet count> 90*10^9/L, hemoglobin> 9g/dL; liver function: serum bilirubin was less than 2* maximum normal value; ALT and AST were less than 2.5*maximum normal value; BUN, Cr within 80% of normal range;