GraphCleanse: Defending Backdoor Attacks in Graph Learning via Contrastive Training. - Jiale Zhang 001; Hao Sui; Wanquan Zhu; Chengcheng Zhu; Xiaobing Sun 001; Chunpeng Ge 001; Bing Chen 002; Mingsheng Cao (IEEE Trans. Inf. Forensics Secur., 2025)