?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Ortiz-Sanchez&rft.au=Ortiz-Sanchez%2C+Marco+Antonio&rft.aufirst=Marco+Antonio&rft.date=28+May+2020&rft.title=Role+of+Sonic+Hedgehog+signalling+in+regulating+neural+stem+cell+activity+in+the+adult+and+aged+murine+hippocampus&rft.inst=UCL+(University+College+London)&rft.tpages=212&rft.degree=Doctoral