Corrigendum: Hybrid Indicators for Fast and Sensitive Voltage Imaging. Issue 43 (14th October 2019) - Xu, Yongxian; Peng, Luxin; Wang, Sicong; Wang, Anqi; Ma, Ruirui; Zhou, Ying; Yang, Jiahe; Sun, De‐en; Lin, Wei; Chen, Xing; Zou, Peng