Received: 20 March 2018
Accepted: 7 November 2018
First Online: 30 November 2018
Ethics approval and consent to participate
: This study was approved by the local institutional review board of China-Japan Union Hospital of Jilin University (No. 201601007). Written informed consent (including patients’ details) was obtained from all participants. This study was conducted in accordance to the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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