Received: 6 July 2020
Accepted: 30 September 2020
First Online: 6 October 2020
Ethics approval and consent to participate
: The study was approved by the institutional review board (IEC) for clinical and animal trials of the First Affiliated Hospital of Sun Yat-sen University on April 30th, 2020. We used only recorded medical data; the IEC at our center approved the study and waived the requirement for informed consent. The access to patients’ medical records was permitted by the spine surgery department of the First Affiliated Hospital of Sun Yat-sen University. The patients’ names and ID numbers were de-identified prior to data collection.
: The male in Fig. InternalRef removed have previously given his signed consent for further potential publication.
: The authors declare that they have no competing interests.