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Article History

Received: 11 January 2018

Accepted: 22 August 2018

First Online: 11 September 2018

Ethics approval and consent to participate

: Ethical approval was obtained from the respective institutional review boards of the Ethics Committee of Sun Yat-sen University Cancer Center (Approval No: YB2017–04). All patients provided written informed consent to participate in this study.

: Not applicable

: All the authors declare that they have no conflicts of interest.

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