[1] Massachusetts Gen Hosp, Lab Cellular Neurobiol, Dept Neurol, Charlestown, MA 02129 USA
[2] Univ Massachusetts, Sch Med, Dept Med, Worcester, MA USA
[3] Univ Massachusetts, Sch Med, Dept Cell Biol, Worcester, MA USA
[4] RIKEN, Brain Sci Inst, Lab Neural Architecture, Wako, Saitama, Japan
[5] Osaka Univ, Sch Med, Dept Anat, Osaka, Japan
[6] Iwate Med Univ, Sch Med, Ctr Electron Microscopy & Bioimaging Res, Dept Neuroanat, Morioka, Iwate 020, Japan