Funding for this research was provided by:
the National Natural Science Foundation of China (U1301227)
the National High-Tech Research and Development Program of China (SQ2015AA0202183)
Text and Data Mining valid from 2018-04-02
Received: 31 October 2016
Accepted: 23 March 2018
First Online: 2 April 2018
Ethics approval and consent to participate
: Since the tissues used in this study are from patients diagnosed between 1973 and 2015 not from all patients a written informed consent is available. But in accordance with the Chinese law, the study was reviewed and approved by the Ethics committee of Zhengzhou University (No.16047) and it was conducted in accordance with the Declaration of Helsinki. All samples were anonymized before analysis was performed, to guarantee the protection of privacy.
: Not applicable.
: The authors declare that they have no competing interests.
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