Erratum to: Frequently asked questions about chlorophyll fluorescence, the sequel. - Kalaji, Hazem M.; Schansker, Gert; Brestic, Marian; Bussotti, Filippo; Calatayud, Ángeles; Ferroni, Lorenzo; Goltsev, Vasilij; Guidi, Lucia; Jajoo, Anjana; Li, Pengmin; Losciale, Pasquale; Mishra, Vinod K.; et al. (2018)