Erratum for: Multiplex CRISPR-Cas9 editing of DNA methyltransferases in rice uncovers a class of non-CG methylation specific for GC-rich regions. Issue 4 (11th November 2021) - Hu, Daoheng; Yu, Yiming; Wang, Chun; Long, Yanping; Liu, Yue; Feng, Li; Lu, Dongdong; Liu, Bo; Jia, Jinbu; Xia, Rui; Du, Jiamu; Zhong, Xuehua; et al.