[1] Tohoku Univ, Grad Sch Med, Dept Neurosurg, 1-1 Seiryo Cho,Aoba Ku, Sendai, Japan
[2] Tokyo Womens Med Univ, Dept Neurosurg, Tokyo, Japan
[3] Kitasato Univ, Sch Med, Dept Neurosurg, Sagamihara, Japan
[4] Kyorin Univ Facil Med, Dept Neurosurg, Tokyo, Japan
[5] Kobe Univ, Grad Sch Med, Dept Neurosurg, Kobe, Japan
[6] Hokkaido Univ, Fac Med, Dept Neurosurg, Sapporo, Japan
[7] Niigata Univ, Brain Res Inst, Dept Neurosurg, Niigata, Japan
[8] Chiba Univ, Grad Sch Med, Dept Neurol Surg, Chiba, Japan
[9] Univ Yamanashi, Dept Neurosurg, Yamanashi, Japan
[10] Kanazawa Univ, Dept Neurosurg, Kanazawa, Japan
[11] Kumamoto Univ, Fac Life Sci, Dept Neurosurg, Kumamoto, Japan
[12] Univ Tsukuba, Inst Med, Dept Neurosurg, Tsukuba, Japan
[13] Kyushu Univ, Grad Sch Med Sci, Dept Neurosurg, Fukuoka, Japan
[14] Hiroshima Univ, Grad Sch Biomed & Hlth Sci, Dept Neurosurg, Hiroshima, Japan
[15] Yamagata Univ, Fac Med, Dept Neurosurg, Yamagata, Japan
[16] Osaka Int Canc Inst, Dept Neurosurg, Osaka, Japan
[17] Kagoshima Univ, Grad Sch Med & Dent Sci, Dept Neurosurg, Kagoshima, Japan
[18] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Neurol Surg, Okayama, Japan
[19] Saga Univ, Fac Med, Dept Neurosurg, Saga, Japan
[20] St Marianna Univ, Sch Med, Dept Neurosurg, Kawasaki, Kanagawa, Japan
[21] Kansai Med Univ, Dept Neurosurg, Hirakara, Japan
[22] Kyoto Univ, Grad Sch Med, Dept Neurosurg, Kyoto, Japan
[23] Keio Univ, Sch Med, Dept Neurosurg, Tokyo, Japan
[24] Univ Miyazaki, Fac Med, Dept Clin Neurosci, Div Neurosurg, Miyazaki, Japan
[25] Univ Fukui, Fac Med Sci, Dept Neurosurg, Div Med, Fukui, Japan
[26] Yokohama City Univ, Grad Sch Med, Dept Neurosurg, Yokohama, Japan
[27] Shizuoka Canc Ctr, Div Neurosurg, Nagaizumi, Japan
[28] Iwate Med Univ, Dept Neurosurg, Shiwa, Japan
[29] Tokyo Med & Dent Univ, Dept Neurosurg, Tokyo, Japan
[30] Hamamatsu Univ, Sch Med, Dept Neurosurg, Hamamatsu, Japan
[31] Fujita Hlth Univ, Dept Neurosurg, Toyoake, Japan
[32] Hirosaki Univ, Grad Sch Med, Dept Neurosurg, Hirosaki, Japan
[33] Fukushima Med Univ, Dept Neurosurg, Fukushima, Japan
[34] Asahikawa Med Univ, Dept Neurosurg, Asahikawa, Hokkaido, Japan
[35] Kagawa Univ, Fac Med, Dept Neurol Surg, Kagawa, Japan
[36] Gifu Univ, Grad Sch Med, Dept Neurosurg, Gifu, Japan
[37] Ehime Univ, Sch Med, Dept Neurosurg, Toon, Japan
[38] Akita Univ, Grad Sch Med, Dept Neurosurg, Akita, Japan
[39] Wakayama Med Univ, Sch Med, Dept Neurol Surg, Wakayama, Japan
[40] Sapporo Med Univ, Dept Neurosurg, Sapporo, Japan
[41] Tokyo Med Univ, Dept Neurosurg, Tokyo, Japan
[42] Nihon Univ, Sch Med, Dept Neurol Surg, Tokyo, Japan
[43] Kochi Univ, Kochi Med Sch, Dept Neurosurg, Kochi, Japan
[44] Nakamura Mem Hosp, Brain Tumor Ctr, Dept Neurosurg, Sapporo, Japan
[45] Tohoku Univ, Grad Sch Med, Div Biostat, Sendai, Japan
[46] Natl Canc Ctr, Dept Neurosurg & Neurooncol, Tokyo, Japan