(DPYD OR DPD OR [dihydropyrimidine dehydrogenase])

AND

(GENOTYPE OR GENE OR GENOTYPING)

AND

(ONCOLOGY OR CANCER)

AND

(TREATMENT OR THERAPY)

AND

(5‐FU OR fluoropyrimidines OR Fluorouracil OR capecitabine OR Teysuno OR tegafur OR S‐1)