1. Department of Statistics and Informatics Science; Providence University; Taichung 43301 Taiwan
2. Department of Financial and Computational Mathematics; Providence University; Taichung Taiwan
3. Division of Allergy, Immunology and Rheumatology, Department of Medicine; Chung Shan Medical University Hospital; Taiwan
4. Institute of Medicine; Chung Shan Medical University; Taichung Taiwan
5. Department of International Trade; Kun Shan University; Tainan 71003 Taiwan