Received: 1 April 2020
Accepted: 15 June 2020
First Online: 19 June 2020
Ethics approval and consent to participate
: This article has been approved by the Medical Ethical Committee of Chinese PLA General Hospital. We confirm that the parents of all patients have given their parental consents for this study in verbal. In our hospital, there is not a routine written form of consent to participate in the accompanying scientifc reaserch during routine clinical activities, however, if the accompanying scientific reaserch is not related to the patients confidential informations like in this study, it is assured to be allowable by the parents and the ethical committee of our hospital.
: All the parents of involved children have signed the Informed Content Form before surgery. In this study, there is no any indentifying personal or clinical details along with any indentifying images to be published.
: The author declares that no competing interests exist.