Received: 28 September 2018
Accepted: 27 November 2018
First Online: 18 December 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Lion Lake Hospital affiliated to Guangdong Institute of Target Tumor Intervention and Prevention.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.