AUTHOR=Redolat Rosa , Mesa-Gresa Patricia , Sampedro-Piquero Patricia , Cutuli Debora TITLE=Editorial: Environmental Enrichment as a Treatment? Epigenetic Mechanisms, Challenges and Limitations JOURNAL=Frontiers in Pharmacology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2021.658970 DOI=10.3389/fphar.2021.658970 ISSN=1663-9812