1. Department of Family Medicine, Changhua Christian Hospital, Changhua 500, Taiwan, R.O.C.
2. Department of Neurology and Department of Medical Intensive Care Unit, Changhua Christian Hospital, Changhua 500, Taiwan, R.O.C.
3. Institute of Medicine, College of Medicine, Chung Shan Medical University, Taichung 402, Taiwan, R.O.C.