1. Department of Traditional Chinese Medicine, Changhua Christian Hospital, Changhua 500, Taiwan
2. Graduate Institute of Statistics and Information Science, National Changhua University of Education, Changhua 500, Taiwan
3. Department of Healthcare Administration, Central Taiwan University of Science and Technology, Taichung 402, Taiwan
4. Department of Health Services Administration, China Medical University, Taichung 402, Taiwan
5. Department of Computer Science & Engineering, National Sun Yat-sen University, Kaohsiung 424, Taiwan