AUTHOR=Vardoulakis Sotiris , Kinney Patrick TITLE=Grand Challenges in Sustainable Cities and Health JOURNAL=Frontiers in Sustainable Cities VOLUME=1 YEAR=2019 URL=https://www.frontiersin.org/journals/sustainable-cities/articles/10.3389/frsc.2019.00007 DOI=10.3389/frsc.2019.00007 ISSN=2624-9634