WEE1 and neutropenia: Notably, one cluster showed a strong positive association with neutropenia, granulocytopenia, agranulocytosis, neutropenic sepsis, neutropenic colitis, neutropenic infection, and febrile neutropenia, whereas the other, comprising protein kinase inhibitors and monoclonal antibodies (excluding the antimetabolite methotrexate), was less associated with CIN.