Funding for this research was provided by:
This study was supported by The 2018 Nursing Scientific Researches of Nanjing Drum Tower Hospital (No. ZSH202-4)
Text and Data Mining valid from 2019-02-26
Received: 14 August 2018
Accepted: 17 February 2019
First Online: 26 February 2019
Ethics approval and consent to participate
: This study was approved by the ethical committee of Nanjing Drum Tower Hospital.
: 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.