{"paper_id":"1d40e0a0-ca18-4828-a8c7-80227931ba4c","body_text":"The authors certify that they have obtained all appropriate patient consent forms. In the form, the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.\n\nWe thank the members from the Department of Pathology, Peking Union Medical College for their help with the pathological reviews in this study.\n\nThis work was supported by grants from the National Key R&D Program of China (No. 2017YFC1001200), CAMS Youth Talent Award Project (No. 2018RC320006), and Chinese Academy of Medical Sciences Initiative for Innovative Medicine (No. CAMS-2017-I2M-1-002).\n\nNone.","source_license":"CC0","license_restricted":false}