An Open-Label, Single-Arm, Multicenter Pharmacokinetic Study of Intramuscular Erwinaze® (Asparaginase Erwinia Chrysanthemi)/Erwinase® (Crisantaspase)

"* Enrolled patients will receive asparaginase Erwinia chrysanthemi 25,000 IU/m2 administered intramuscularly (IM) on a Monday/Wednesday/Friday schedule (all dosing regimens will start on a Monday)~* All patients will receive at least 1 course (2 weeks) of treatment with asparaginase Erwinia chrysanthemi (1 course=6 doses), and a maximum number of courses needed to complete their remaining asparaginase therapy (up to 15 courses)~* Eligible patients may not begin treatment with asparaginase Erwinia chrysanthemi until their serum asparaginase activity level is below the assay detectable limit"