1. School of MedicineTzu Chi University, Hualien 970, Taiwan
2. Department of Internal Medicine, Buddhist Dalin Tzu Chi Hospital, Chiayi County 622, Taiwan
3. Department of Family Medicine, Buddhist Dalin Tzu Chi Hospital, Chiayi County 622, Taiwan
4. Institute of Medical SciencesTzu Chi University, Hualien 970, Taiwan
5. Department of Obstetrics and Gynecology, Buddhist Tzu Chi Medical Center, Hualien 970, Taiwan
6. Institute of MedicineChung Shan Medical University, Taichung 402, Taiwan
7. Departments of Clinical Pathology and Anatomic Pathology, Buddhist Dalin Tzu Chi Hospital, Chiayi County 622, Taiwan