Assertion: aflatoxin's effect | /r/HasProperty | assessed in urine samples
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text: In the study reported to date in an aflatoxin-exposed high-risk group in Guangxi, China, the effects of GTP on the oxidative DNA damage biomarker, 8-hydroxydeoxyguanosine (8-OHdG), was assessed in urine samples collected from a randomized, double-blinded, placebo-controlled, Phase IIa, chemoprevention trial (Luo et al. 2006).