1. Department of Management Information Systems, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, Taiwan
2. Institute of Nanotechnology, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 300, Taiwan
3. Department of Obstetrics and Gynecology, China Medical University and Hospital, 91 Hsueh-Shih Road, Taichung 404, Taiwan
4. Department of Obstetrics and Gynecology, Kuang Tien General Hospital, 117, Sha-Tian Road, Sha-Lu, Taichung 433, Taiwan
5. Institute of Chinese Medical Sciences, China Medical University, 91 Hsueh Shih Road, Taichung 404, Taiwan
6. Department of Nursing, Hung Kuang University, 34 Chuang-Chie Road, Sha Lu, Taichuang 433, Taiwan