FENP: A Database of Neonatal Facial Expression for Pain Analysis. - Jingjie Yan; Guanming Lu; Xiaonan Li; Wenming Zheng; Chengwei Huang; Zhen Cui 001; Yuan Zong; Mengying Chen; Qiang Hao; Yi Liu; Jindu Zhu; Haibo Li 001 (IEEE Trans. Affect. Comput., 2023)