AUTHOR=Berenguer Marie , Duester Gregg TITLE=Genetic loss-of-function does not support gain-of-function studies suggesting retinoic acid controls limb bud timing and scaling JOURNAL=Frontiers in Cell and Developmental Biology VOLUME=11 YEAR=2023 URL=https://www.frontiersin.org/journals/cell-and-developmental-biology/articles/10.3389/fcell.2023.1149009 DOI=10.3389/fcell.2023.1149009 ISSN=2296-634X