Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Tandis Vazin and Randolph S. Ashton and Anthony Conway and Nikhil A. Rode and Susan M. Lee and Verenice Bravo and Kevin E. Healy and Ravi S. Kane and David V. Schaffer,The effect of multivalent Sonic hedgehog on differentiation of human embryonic stem cells into dopaminergic and GABAergic neurons,Biomaterials,0142-9612,Elsevier BV,2014-01,35,3,941-948,https://cir.nii.ac.jp/crid/1363951793677888896,https://doi.org/10.1016/j.biomaterials.2013.10.025