1. Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 302, Taiwan
2. Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833, Taiwan
3. Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
4. Department of Surgery, Chi Mei Foundation Medical Centre, Tainan 710, Taiwan
5. Department of Occupational Safety and Health/Institute of Industrial Safety and Disaster Prevention, College of Sustainable Environment, Chia Nan University of Pharmacy and Science, Tainan 717, Taiwan
6. Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
7. Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
8. Department of Paediatrics, Chi Mei Foundation Medical Centre, Tainan 710, Taiwan
9. Department of Neurology and Occupational Medicine, Chi Mei Foundation Medical Centre, Tainan 710, Taiwan
10. Department of Pediatric Surgery, Kaohsiung Chang Gung Memorial Hospital-Kaohsiung Medical Center, Kaohsiung 833, Taiwan
11. Department of Surgery, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan