[1] SOSEIKAI GEN HOSP,DEPT RADIOL,KYOTO,JAPAN
[2] SHINSAPPORO NEUROSURG HOSP,DEPT NEUROSURG,SAPPORO,HOKKAIDO,JAPAN
[3] KOHNAN HOSP,DEPT NEUROSURG,SENDAI,MIYAGI,JAPAN
[4] KYOTO PREFECTURAL UNIV MED,DEPT NEUROSURG,KYOTO 602,JAPAN
[5] EHIME UNIV,SCH MED,DEPT RADIOL,MATSUYAMA,EHIME 790,JAPAN
[6] KAMEDA MED CTR,DEPT RADIOL,CHIBA,JAPAN
[7] KEIO UNIV,SCH MED,DEPT DIAGNOST RADIOL,TOKYO,JAPAN
[8] KYORIN UNIV,SCH MED,DEPT NEUROSURG,MITAKA,TOKYO 181,JAPAN
[9] SAITAMA MED SCH,DEPT RADIOL,MOROYAMA,SAITAMA 35004,JAPAN
[10] NAKATSUGAWA MUNICIPAL GEN HOSP,DEPT NEUROSURG,NAKATSUGAWA,JAPAN