1. Department of Electronic Engineering; Feng Chia University; No. 100, Wenhwa Rd., Seatwen Taichung 40724 Taiwan
2. Ph. D. Program of Electrical and Communications Engineering; Feng Chia University; No. 100, Wenhwa Rd., Seatwen Taichung 40724 Taiwan
3. Professor & Director in Stem Cell Center; Department of Medical Research; Taichung Veterans General Hospital; No. 160, 3rd Section, Taichung Harbor Road Taichung 40705 Taiwan
4. Department of Dentistry; College of Oral Medicine; Chung Shan Medical University; Dental Department; Chung Shan Medical University Hospital; No. 110, Sec. 1, Jianguo N. Rd. Taichung 40201 Taiwan