Akira Kuriyama1, Kazuaki Sato2. 1. Departments of General Medicine (Kuriyama) and Neurology (Sato), Kurashiki Central Hospital, Okayama, Japan nrk40448@nifty.com. 2. Departments of General Medicine (Kuriyama) and Neurology (Sato), Kurashiki Central Hospital, Okayama, Japan.