<p>Statistically significant (<i>p</i><0.05) differences in uptake were observed in the tumour and kidney in both MCF-7 and MDA-MB-231 xenograft models *<i>p</i><0.05. (Li (231): Liver from MDA-MB-231 tumour bearing mice, K (231): Kidneys from MDA-MB-231 tumour bearing mice, T (231): MDA-MB-231 xenograft, Li (MCF-7): Liver from MCF-7 tumour bearing mice, K (MCF-7): Kidney from MCF-7 tumour bearing mice, T (MCF-7): MCF-7 xenograft).</p