AUTHOR=Challet Etienne , Kalsbeek Andries TITLE=Editorial: Circadian Rhythms and Metabolism JOURNAL=Frontiers in Endocrinology VOLUME=8 YEAR=2017 URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2017.00201 DOI=10.3389/fendo.2017.00201 ISSN=1664-2392