Received: 21 March 2018
Accepted: 19 July 2018
First Online: 24 July 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee at the Second Affiliated Hospital of Soochow University (Suzhou, China). The privacy of patients involved was protected. Patients provided written informed consent.
: Study participants provided consent for the publication of the data and any associated images.
: The authors declare that they have no competing interests.
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