Comparison of biodegradable and metal occluders in patients with PFO and migraine: study design and rationale of BioMetal Trial. - Li, Ziping; Dong, Jie; Dong, Jing; Yan, Yiming; Gao, Manchen; Fang, Fang; Zhang, Fengwen; Ouyang, Wenbin; Wang, Shouzheng; Wang, Chuangshi; Pan, Xiangbin (Trials, 2025)