RETRACTED: Corrigendum: Akt2 Regulates the Differentiation and Function of NKT17 Cells via FoxO-1-ICOS Axis - Niu, LinLin; Xuan, Xingtian; Wang, Jinzhi; Li, Liling; Yang, Di; Jing, Yukai; Westerberg, Lisa S.; Liu, Chaohong (Frontiers in Immunology, 2020)