AUTHOR=Migliaccio Gian Mario , Dello Iacono Antonio , Ardigò Luca Paolo , Samozino Pierre , Iuliano Enzo , Grgantov Zoran , Padulo Johnny TITLE=Corrigendum: Leg Press vs. Smith Machine: Quadriceps Activation and Overall Perceived Effort Profiles JOURNAL=Frontiers in Physiology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2018.01856 DOI=10.3389/fphys.2018.01856 ISSN=1664-042X