1. Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
2. Department of Medical Imaging and Radiological Sciences, College of Health Science, Kaohsiung Medical University, Taiwan
3. Shing-Hou Hospital, Kaohsiung, Taiwan
4. School of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung, Taiwan