Text and Data Mining valid from 2019-07-29
Received: 9 April 2019
Accepted: 22 July 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: This research project was approved by the Ethics Committee of Tianjin Cancer Institute and Hospital. Written consents were obtained from each patient.
: Written consents were obtained from each patient to publishing their pathological images as represent Figures.
: The authors declare that they have no competing interests.