<p>Unsorted (EPO-R+/−) and sorted EPO-R− and EPO-R+, patient-derived, melanoma cells (patients #6 and #7) were injected subcutaneously into NSG mice (4–6 mice in each group). After 15 weeks, tumors were visible, mice were sacrificed, and the tumor-volumes were determined. <i>A</i>, Results show the median tumor-volumes (mm<sup>3</sup>) in each group. <i>B</i>, A melanoma cell-containing tumor formed in an NSG mouse by EPO-R− cells obtained from patient #6.</p
