1. Department of Neurology; Oita Prefectural Hospital; 476 Bunyo Oita 870-0855 Japan
2. Department of Clinical Laboratory; Oita Prefectural Hospital; Oita Japan
3. School of Health Sciences, Faculty of Medicine, Kagoshima University; Kagoshima Japan
4. Diagnostic Unit for Amyloidosis; Department of Laboratory Medicine; Kumamoto University Hospital; Kumamoto Japan