Wei, Yating
Song, Haidong
Article History
Received: 13 July 2023
Accepted: 27 October 2023
First Online: 20 November 2023
Declarations
:
: The investigation was approved by the Ethics Committee of Hangzhou Seventh People’s Hospital. On the one hand, the hotline data in this study are recorded, and callers are informed before collecting information. Data collection can only take place with the informed consent of the caller. On the other hand, the hotline itself is anonymous, and this study is retrospective and does not involve any sensitive personal information, so the Ethics Committee of Hangzhou Seventh People’s Hospital concluded that the study had no ethical implications.
: Not applicable.
: The authors declare no competing interests.