Text and Data Mining valid from 2018-11-08
Received: 19 August 2018
Accepted: 29 October 2018
First Online: 8 November 2018
Ethics approval and consent to participate
: This study was reviewed and approved by the Ethics Committee of Beijing Chaoyang Hospital. Patients were not required to provide informed consent because the analysis used anonymous clinical data that were obtained after each patient agreed to treatment by written consent.
: Written informed consent was obtained from the patients for publication of these case reports and accompanying images.
: The authors declare that they have no competing interests.
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