Classification, angioarchitecture and treatment outcomes of medullary bridging vein-draining dural arteriovenous fistulas in the foramen magnum region: a multicenter study - Tomohiko Ozaki; Masafumi Hiramatsu; Hajime Nakamura; Yasunari Niimi; Shuichi Tanoue; Katsuhiro Mizutani; Ichiro Nakahara; Yuji Matsumaru; Yasushi Matsumoto; Timo Krings; Toshiyuki Fujinaka (Neuroradiology, 2024)