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Article History

Received: 12 May 2019

Accepted: 9 September 2019

First Online: 18 September 2019

Ethics approval and consent to participate

: All applicable international, national, and/or institutional guidelines for the care and use of human specimens and animals were followed. The animal study was carried out in accordance with the guidelines approved by the Animal Experimentation Ethics Committee of the secondary hospital of Tianjin medical university. The protocol was approved by the Committee, all surgery was performed under sodium pentobarbital anesthesia, and all efforts were made to minimize suffering.

: The research involving human participants had been approved by our hospital and our equivalent committee. The participants provided their written informed consents before the surgeries to participate in this study, but these could not be included in the report because of the large volume and individual privacy, and the consents were written in Chinese.

: All of the authors have agreed to publish this article in your journal if it is accepted.

: The authors declare that they have no competing interests.