Funding for this research was provided by:
National Nature Science Foundation of China (81872835)
National Nature Science Foundation of China (81870525)
Key Research and Development program of Shandong Province (2018GSF118118)
Received: 12 June 2019
Accepted: 29 August 2019
First Online: 11 September 2019
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of the Affiliated Yantai Yuhuangding Hospital of Qingdao University (Yantai, Shandong). Every patient who underwent the 3D reconstruction signed the informed consent form.
: Not applicable.
: The authors declare that they have no competing interests.