Human amniotic fluid stem cells do not differentiate into dopamine neurons in vitro or after transplantation in vivo.
Donaldson AE, Cai J, Yang M, Iacovitti L. Human amniotic fluid stem cells do not differentiate into dopamine neurons in vitro or after transplantation in vivo. Stem Cells Dev. 2009 Sep; 18(7):1003-12.