Kainan University, National Taiwan University - Graduate Institute of Epidemiology and Preventive Medicine, National Taiwan University - Graduate Institute of Epidemiology and Preventive Medicine, Taiwan Adventist Hospital - Department of Surgery, Taipei Medical University, National Defense Medical Center, Taipei Medical University, National Taiwan University - National Taiwan University Hospital (NTUH), Falun Central Hospital and National Taiwan University - Graduate Institute of Epidemiology and Preventive Medicine