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Article History

Received: 7 March 2018

Accepted: 23 October 2018

First Online: 1 November 2018

Ethics approval and consent to participate

: The Ethics Committee of Shanghai Jiao Tong University Affiliated Sixth People’s Hospital East Branch concludes that no approval is necessary for study based on its retrospective design. Data were analyzed anonymously; all patients approved the results of this study and use of their images for publication by written consent. The consent approval was documented in the patients’ files. This was approved by the Ethics Committee of Shanghai Jiao Tong University Affiliated Sixth People’s Hospital East Branch. The permission was obtained from each of the health centers to access patient data. Clinical investigations were conducted in accordance with the guidelines of the Declaration of Helsinki.

: The consent was obtained from all patients involved in this study to include their data in any form (including individual details, images or videos) for publication.

: The authors declare that they have no competing interests.

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