YWHAZ and B-cell non-Hodgkin lymphoma: Several genes including tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, zeta polypeptide (Ywhaz), ubiquitin C (Ubc), and Actb have been proposed as suitable reference genes for human lymph nodes with B cell lymphomas and non-neoplastic specimens [9].