Figure 1: Schematic illustration of methods to apply stem/progenitor cells (s/pC) (a – d). Schema depicts infusion via blood vessels (a), by accidental injection of cell suspensions in the parenchyma (b), by subcapsular implantation of cell suspensions (c) and by subcapsular implantation of stem/ progenitor cells adhering to a biomaterial (d). Capsula fibrosa (CF), tubules (T), blood vessels (V) and interstitial cells (IC).