AUTHOR=Vickhoff Björn , Malmgren Helge , Åström Rickard , Nyberg Gunnar F., Ekström Seth-Reino , Engwall Mathias , Snygg Johan , Nilsson Michael , Jörnsten Rebecka TITLE=Erratum: Music structure determines heart rate variability of singers JOURNAL=Frontiers in Psychology VOLUME=4 YEAR=2013 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2013.00599 DOI=10.3389/fpsyg.2013.00599 ISSN=1664-1078