1 Selection of cell recipients. 2 Selection of cell donors. 3 Selection of cells. 4 Poor retention of injected cells. 5 Suboptimal cell potency. 6 Route and method of cell delivery. 7 Optimal dose, no ...

In ancient Rome, the 2-faced mythological Janus God symbolized the duality of the principles of presiding over all beginnings and transitions, whether abstract or concrete. 1 The bipolar concepts ...