1. Department of Medical Imaging and Radiological Sciences, Central Taiwan University of Science and Technology, Taichung 406, Taiwan, ROC
2. Department of Cardiology, Taichung Armed Forces General Hospital, Taichung 411, Taiwan, ROC
3. Department of Nursing, Taichung Armed Forces General Hospital, Taichung 411, Taiwan, ROC
4. Department of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung 402, Taiwan, ROC
5. Department of Radiology, BenQ Medical Center, The Affiliated BenQ Hospital of the Nanjing Medical University, Nanjing, Jiangsu, P. R. China
6. Department of Orthopedic Surgery, Feng Yuan Hospital, Taichung 100, Ministry of Health and Welfare, Taiwan, ROC