1. Department of Neurology, Institute of Health Bioscience, Graduate School of Medical Sciences; The University of Tokushima; 3-18-15 Kuramoto Tokushima 770-8503 Japan
2. Japanese Multifocal Motor Neuropathy Study Group
3. Department of Hygiene; Fujita Health University School of Medicine; Toyoake Japan
4. Department of Preventive Medicine, Institute of Health Bioscience; Tokushima University Graduate School of Medicine; Tokushima Japan
5. Department of Neurology; Kinki University School of Medicine; Osaka Japan