<qa>  What is the average upper limit for serum bilirubin?5. Adequate liver function with serum bilirubin lower than 2 times the normal upper limit, Aspartate aminotransferaseAST Alanine aminotransaminaseALT lower than 3 times the normal upper limit. In case of DLBCL liver invasion; serum bilirubin lower than 5 times the normal upper limit, ASTALT lower than 5 times the normal upper limit. 