CSF3 and neutropenia: Pegfilgrastim (Neulasta®, Amgen, Thousand Oaks, CA), the polyethylene glycol‐conjugated form of G‐CSF, is a long‐acting myeloid growth factor that is administered subcutaneously (SC) on a more convenient, less frequent dosing schedule (i.e., as a single dose administered once‐per‐cycle of chemotherapy) and has demonstrated improved reduction of neutropenia over both placebo and filgrastim 7, 8, 9, 10, 11, 12, 13.