Article History
Received: 11 September 2019
Accepted: 10 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: This study was approved by the Committee on Medical Ethnic of Shouguang Hospital of Traditional Chinese Medicine (permit number 20170301) and was <i>carried out in strict accordance with the recommendations in the Guide of “Methods for ethical review of biomedical research involving humans(2016)” from the state health and family planning commission of the People’s Republic of China.</i> All patients provided written, informed consent for the surgery. This study has been registered and the unique identifying number is researchregistry5092.
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: The authors declare that they have no competing interests.