1. Department of Surgery Helen Diller Family Comprehensive Cancer Center University of California San Francisco CA USA
2. Department of Thoracic Medicine Chang Gung Memorial Hospital Linkou Taoyuan Taiwan
3. Department of Thoracic Surgery Beijing Chao‐Yang Hospital Affiliated with Capital Medical University Beijing China
4. Department of Hepatobiliary Surgery National Cancer Center/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
5. Department of Pathology University of California San Francisco CA USA