Trends and Progress in Neuroendovascular Treatment in Japan: Japanese Registry of Neuroendovascular Therapy (JR-NET) 4. Main Report oleh Nobuyuki SAKAI, Satoru FUJIWARA, Kazutaka UCHIDA, Koji IIHARA, Hirotoshi IMAMURA, Akira ISHII, Yuji MATSUMARU, Chiaki SAKAI, Tetsu SATOW, Shinichi YOSHIMURA, Yasushi MATSUMOTO, Hidenori OISHI, Naoto KIMURA, Masayuki EZURA, Tatsufumi NOMURA, Shinzo OTA, Akio HYODO, Fuminori SHIMIZU, Japanese Registry of Neuroendovascular Therapy (JR-NET) Investigators