AUTHOR=Massotte Dominique TITLE=Editorial: Monitoring endogenous GPCRs: lessons for drug design JOURNAL=Frontiers in Pharmacology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2015.00146 DOI=10.3389/fphar.2015.00146 ISSN=1663-9812