Corrigendum: Cell Type-Dependent Activation Sequence During Rhythmic Bursting in the PreBötzinger Complex in Respiratory Rhythmic Slices From Mice - Oke, Yoshihiko; Miwakeichi, Fumikazu; Oku, Yoshitaka; Hirrlinger, Johannes; Hülsmann, Swen (Frontiers in Physiology, 2018)