Corrigendum: N-Net: A novel dense fully convolutional neural network for thyroid nodule segmentation - Nie, Xingqing; Zhou, Xiaogen; Tong, Tong; Lin, Xingtao; Wang, Luoyan; Zheng, Haonan; Li, Jing; Xue, Ensheng; Chen, Shun; Zheng, Meijuan; Chen, Cong; Du, Min (Frontiers in Neuroscience, 2022)