1. Department of Radiology, Yong-Kang Campus, Chi-Mei Medical Center, Taiwan, R.O.C.
2. Section of Thoracic and Circulation Imaging, Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, R.O.C.
3. Faculty of medicine, School of medicine, National Yang Ming University, Taipei, Taiwan, R.O.C.
4. Department of Radiology, National Defense Medical Center, Taiwan, R.O.C.
5. Department of Radiological Technology, Central Taiwan University of Science and Technology, Taichung, Taiwan, R.O.C.