AUTHOR=Stecher Heiko I. , Herrmann Christoph S. TITLE=Corrigendum: Absence of Alpha-tACS Aftereffects in Darkness Reveals Importance of Taking Derivations of Stimulation Frequency and Individual Alpha Variability Into Account JOURNAL=Frontiers in Psychology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2018.01769 DOI=10.3389/fpsyg.2018.01769 ISSN=1664-1078