Authors’ contributions
XiaoHua Wang performed the research and drafted the manuscript; SiYuan Zhang performed anaesthesia; Yi Huang performed data collection; Chunxiu Wang analysed and interpreted the data; Hao Wu recruited the patients; Guoguang Zhao elaborated the manuscript; and Tian-Long Wang contributed to the design of the research and agreed to be accountable for all aspects of this work. All authors reviewed the manuscript. All authors approved the final version of the manuscript.