[1] Chung Shan Med & Dent Coll, Dept Internal Med, Neurol Sect, Taichung Vet Gen Hosp, Taichung 407, Taiwan
[2] Chung Shan Med & Dent Coll, Dept Internal Med, Cardiol Sect, Taichung Vet Gen Hosp, Taichung 407, Taiwan
[3] Chung Shan Med & Dent Coll, Dept Internal Med, Sect Endocrinol & Metab, Taichung Vet Gen Hosp, Taichung 407, Taiwan
[4] Natl Yang Ming Univ, Vet Gen Hosp, Neurol Inst, Sect Neurovasc Dis, Taipei 112, Taiwan