INS and type 1 diabetes mellitus: Relative to UCB-MSCs and BM-MSCs, WJ-MSCs demonstrated a superior potential to differentiate into glucose stimulated insulin secreting (GSIS) cells and for better hyperglycemia control in type 1 diabetes (T1D) animal models (Chao et al., 2008; Wu et al., 2009; Wang et al., 2014; El-Demerdash et al., 2015).