1. Graduate Institute of Natural Healing Sciences, Nanhua University, No. 55, Section 1, Nanhua Road, Zhongkeng, Dalin Township, Chiayi County 622, Taiwan
2. Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 407, Taiwan
3. Institute of Biomedical Science, National Chung Hsing University, Taichung 402, Taiwan
4. Department of Education and Research, Taichung Veterans General Hospital, No. 1650, Section 4, Taiwan Boulevard, Taichung 407, Taiwan
5. Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan