AUTHOR=Ramos-Zúñiga Rodrigo , Guerrero-Cázares Hugo , Gómez-Pinedo Ulises , Matias-Guiu Jorge TITLE=Editorial: The Use of Biomaterials With Stem and Precursor Cells in Diseases of the Central Nervous System; A Step to Clinical Trials JOURNAL=Frontiers in Neurology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2021.654890 DOI=10.3389/fneur.2021.654890 ISSN=1664-2295