1. Department of Radiation Oncology, Chi Mei Medical Center, Liouying, Tainan, Taiwan
2. Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Chiu Ho Medical System Co., LTD, Taipei, Taiwan
4. Graduate Institute of Medical Science, Chang Jung Christian University, Tainan, Taiwan
5. Department of Radiation Oncology, Chi Mei Medical Center, Tainan, Taiwan