13 , 15 , 17 This result is quite significant if we consider that preferential uptake of [ 18 F]FDG is interpreted as a distinctive property of cancer tissues. 18 , 19 In another study, the analysis of 3′-deoxy-3′-[ 18 F]fluorothymidine ([ 18 F]FLT) uptake in single cells revealed a bimodal distribution, indicative of the fraction of actively
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