Erratum to "Optical Recording of Action Potentials in Human Induced Pluripotent Stem Cell-Derived Cardiac Single Cells and Monolayers Generated from Long QT Syndrome Type 1 Patients". (23rd January 2020) - Takaki, Tadashi; Inagaki, Azusa; Chonabayashi, Kazuhisa; Inoue, Keiji; Miki, Kenji; Ohno, Seiko; Makiyama, Takeru; Horie, Minoru; Yoshida, Yoshinori