AUTHOR=Castiglioni Paolo TITLE=Commentary: Decomposition of Heart Rate Variability Spectrum into a Power-Law Function and a Residual Spectrum JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=5 YEAR=2018 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2018.00094 DOI=10.3389/fcvm.2018.00094 ISSN=2297-055X