AUTHOR=Northridge Mary E. , Shelley Donna , Rundall Thomas G. , Brownson Ross C. TITLE=Editorial: Methods and Applications in Implementation Science JOURNAL=Frontiers in Public Health VOLUME=7 YEAR=2019 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2019.00213 DOI=10.3389/fpubh.2019.00213 ISSN=2296-2565