Funding for this research was provided by:
National Natural Science Foundation of China (Grant No. 81770876; 81270011; 81472125)
the Shanghai Municipal Health and Family Planning Commission Fund Project (Grant No. 201640057)
Text and Data Mining valid from 2018-11-20
Received: 25 August 2018
Accepted: 31 October 2018
First Online: 20 November 2018
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki. The histological samples collected were analysed and the clinical data were retrieved with the endorsement of the Institutional Review Boards and Ethical Review Boards of The Affiliated hospital of Hebei University; The First Affiliated Hospital, Sun Yat-sen University; Jinshan Hospital, Fudan University; The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology. The informed consent from participants was waived by Ethical Review Boards.
: Not applicable as no identifying personal information is being published in this manuscript.
: The authors declare that they have no competing interests.
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