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Article History

Received: 26 October 2018

Accepted: 21 March 2019

First Online: 2 April 2019

Ethics approval and consent to participate

: None of the cell lines in the study required ethics approval for their use. This study was conducted in compliance with the guidelines of Helsinki Declaration of 2013 and approved by the Ethics Committee of Beijing Cancer Hospital. Written informed consent was obtained from all patients.

: Not applicable.

: The authors declare that they have no competing interests.

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