Studi pembentukan DNA adduct 8-hidroksi-2-deoksiguanosin sebagai biomarker risiko kanker secara in vitro akibat paparan senyawa akrilamida dan logam kromium heksavalen = Study of 8-hydroxy-2-deoxyguanosine DNA adduct as cancer risk biomarker through in vitro exposure of acrylamide and hexavalent chromium