AUTHOR=Sanz-Ezquerro Juan J. , Münsterberg Andrea E. , Stricker Sigmar TITLE=Editorial: Signaling Pathways in Embryonic Development JOURNAL=Frontiers in Cell and Developmental Biology VOLUME=5 YEAR=2017 URL=https://www.frontiersin.org/journals/cell-and-developmental-biology/articles/10.3389/fcell.2017.00076 DOI=10.3389/fcell.2017.00076 ISSN=2296-634X