AUTHOR=Grippo Angela J. TITLE=Opinion: “Heart Rate Variability, Health and Well-Being: A Systems Perspective” Research Topic JOURNAL=Frontiers in Public Health VOLUME=5 YEAR=2017 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2017.00246 DOI=10.3389/fpubh.2017.00246 ISSN=2296-2565