<p>(A) Following implantation of 2x10<sup>6</sup> mMSC, <sup>19</sup>F-MRI was used to quantify the number of cells remaining over 16 days. By day 16, only 2/7 mice had any detectable signal remaining. A significant difference from day 0 is denoted by <b>+</b>, from day 3 by ◆, and from day 9 by ■. (B) The number of detectable cells over a similar time period following a transplant of 1.5x10<sup>6</sup> hMSC. <sup>19</sup>F signal was found to decrease at a slower rate, with observable signal in all mice at endpoint. Statistical significance is denoted in the same way as A.</p
