[1] Univ Rotterdam Hosp, Dr Daniel Den Hoed Canc Ctr, Dept Neurooncol, Rotterdam, Netherlands
[2] Univ Rotterdam Hosp, Dr Daniel Den Hoed Canc Ctr, Dept Pathol, Rotterdam, Netherlands
[3] Erasmus Univ, Dept Immunol, NL-3000 DR Rotterdam, Netherlands
[4] Erasmus Univ, Dept Anat, NL-3000 DR Rotterdam, Netherlands
[5] Kyoto Univ, Fac Med, Dept Morphol Brain Sci, Sakyo Ku, Kyoto 606, Japan
[6] Kyoto Univ, Fac Med, Dept Biol Sci, Sakyo Ku, Kyoto 606, Japan
[7] Natl Inst Physiol Sci, Lab Cerebral Struct, Okazaki, Aichi 444, Japan