[1] Univ Munich, Inst Clin Neuroimmunol, Munich, Germany
[2] Max Planck Inst Neurobiol, Dept Neuroimmunol, Martinsried, Germany
[3] Osaka City Univ, Grad Sch Med, Dept Otolaryngol Head & Neck Surg, Osaka 558, Japan
[4] Univ Munich, Dept Neurol, Munich, Germany