2007c-142 assisted cell-andtissue-basedtherapy cellculture celldifferentiation cells centralnervoussystemdiseases clinicalprotocols cultured cytologicaltechniques cytology developmentalbiology developmentalneurobiology embryonicstemcells genitalia germ-linemutation germcells humanreproductivetechnology immunology methods nerveregeneration neuralstemcells neurogenesis neurons physiology pluripotentstemcells qu25 qu325 qu325s824442007 regenerativemedicine reproductivehealth reproductivemedicine reproductivetechniques research stemcells stemcelltransplantation therapeuticuse therapy transplantation