Corrigendum to "Transport of intensity equation: A tutorial" Optics and Lasers in Engineering, Volume 135 (2020) 106187. (May 2022) - Zuo, Chao; Li, Jiaji; Sun, Jiasong; Fan, Yao; Zhang, Jialin; Lu, Linpeng; Zhang, Runnan; Wang, Bowen; Huang, Lei; Chen, Qian