1. Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan City 33305, Taiwan
2. College of Medicine, Chang Gung University, Taoyuan City 33305, Taiwan
3. Department of Otolaryngology–Head and Neck Surgery, New Taipei Municipal Tucheng Hospital (Built and Operated by Chang Gung Medical Foundation), New Taipei City 23652, Taiwan
4. Department of Anatomic Pathology, Chang Gung Memorial Hospital at Linkou, Taoyuan City 33305, Taiwan
5. School of Medicine, National Tsing-Hua University, Hsinchu 300044, Taiwan
6. Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital at Linkou, Taoyuan City 33305, Taiwan