“…Although embryonic and fetal stem cells have the greatest potential to differentiate into different cell types, their application is limited due to ethical and safety issues [ 5 , 6 , 7 , 8 , 9 , 10 ], as well as the danger of unlimited and uncontrolled cells division [ 7 , 8 , 10 , 11 , 12 , 13 , 14 , 15 ]. Furthermore, the inherent heterogenicity and variation associated with cell expansion has become a major MSC limit for its clinical applications [ 16 , 17 , 18 , 19 , 20 ]. In addition, during in vitro cell processing and expansion, changes may occur to MSCs, thereby increasing the risk of MSC therapeutic application.…”