AUTHOR=Brock Judith , Hörning Marcel TITLE=Optimization of H9c2 differentiation leads to calcium-active and striated cardiac cells without addition of retinoic acid JOURNAL=Frontiers in Cell and Developmental Biology VOLUME=12 YEAR=2024 URL=https://www.frontiersin.org/journals/cell-and-developmental-biology/articles/10.3389/fcell.2024.1501540 DOI=10.3389/fcell.2024.1501540 ISSN=2296-634X