1. Department of General Surgery; E-Da Hospital and I-Shou University; Kaohsiung Taiwan
2. Management Office for Health Data; China Medical University Hospital; Taichung Taiwan
3. College of Medicine; China Medical University; Taichung Taiwan
4. Institute of Epidemiology and Preventive Medicine National Taiwan University; Taipei Taiwan
5. Graduate Institute of Clinical Medical Science, College of Medicine, China Medical University; Taiwan
6. Department of Nuclear Medicine and PET Center; China Medical University Hospital; Taichung Taiwan