Clonal Hematopoiesis is a Risk Factor for Chemotherapy-Related Complications

Inclusion Criteria: * Diagnosis of a lymphoma (ex: diffuse large B cell lymphoma (DLBCL), follicular lymphoma, marginal zone lymphoma, small lymphocytic lymphoma/chronic lymphocytic leukemia, Hodgkin's lymphoma, peripheral T cell lymphoma, anaplastic large cell lymphoma, angioimmunoblastic lymphoma, hairy cell leukemia, Waldenstrom's macroglobulinemia, anaplastic large cell lymphoma, small lymphocytic lymphoma/chronic lymphocytic leukemia, and mantle cell lymphoma). * Commencing first or second-line cytotoxic chemotherapy for lymphoma with or without rituximab \[ex: cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP), cyclophosphamide, vincristine and prednisone (CVP), Fludarabine, fludarabine cyclophosphamide (FC), Bendamustine, cisplatin, cytarabine, dexamethasone (DHAP), etoposide, cytarabine, cisplatin, prednisone (ESHAP), gemcitabine, cisplatin and dexamethasone (GDP), Cladribine, Cyclophosphamide, Epirubicin, Vincristine, Prednisone (CEOP), dose-adjusted Dose-adjusted etoposide, prednisone, vincristine, cyclophosphamide, doxorubicin (DA-EPOCH)\] Exclusion Criteria: * Pre-existing diagnosis of myeloid neoplasm * Circulating lymphocyte count \> 10 x 109/L * Significant uncontrolled renal or hepatic impairment \[\>1.5 x upper limit of normal (ULN) bilirubin, \>1.5 x ULN Alanine aminotransferase (ALT), \>1.5 x ULN creatinine\] * HIV * Active infection