The relative frequencies of the CYP2B6 and CYP2C19 alleles in neuroblastoma patients were similar to those previously published in Caucasian populations (Table 2)36,46,69 (https://www.pharmgkb.org/page/cyp2b6RefMaterials, access date: 26.04.2023; https://www.pharmgkb.org/page/cyp2c19RefMaterials). The gene discussed is CYP2C19; the disease is neuroblastoma.