AUTHOR=Mira Helena , Diez del Corral Ruth , Morales Aixa V. TITLE=Editorial: Generation of Neurons and Their Integration in Pre-existing Circuits in the Postnatal Brain: Signalling in Physiological and Regenerative Contexts JOURNAL=Frontiers in Cell and Developmental Biology VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/cell-and-developmental-biology/articles/10.3389/fcell.2020.00560 DOI=10.3389/fcell.2020.00560 ISSN=2296-634X