Tong, Yongsheng
Conner, Kenneth R.
Yin, Yi
Zhao, Liting
Wang, Yuehua
Wu, Mengjie
Wang, Cuiling
Article History
Received: 13 January 2021
Accepted: 8 July 2021
First Online: 20 July 2021
Declarations
:
: The study was approved by the Institutional Review Board of the Beijing Huilongguan Hospital (2020–19-Science). All methods were performed in accordance with the Declaration of Helsinki and it’s later amendments. All participants in the present study, i.e., hotline callers, were fully informed by a voice message that all calls would be tape-recorded and data would be collected and analyzed anonymously, and informed consent were obtained from all paricipants. Before analysis, information about the callers was de-identified.
: Not applicable.
: The authors declare that they have no competing interests.