AUTHOR=Flatt Peter R. , Knop Filip K. , Tarasov Andrei I. TITLE=Editorial: Proglucagon-Derived Peptides JOURNAL=Frontiers in Endocrinology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2021.776871 DOI=10.3389/fendo.2021.776871 ISSN=1664-2392