Wu, Dan
Shen, Huan
Article History
Received: 15 June 2021
Accepted: 29 December 2021
First Online: 22 January 2022
Declarations
:
: The study was conducted in accordance with the Declaration of Helsinki (as was revised in 2013). The study was approved by Ethics Committee of the Peking University People’s Hospital. All participants signed a document of informed consent. Informed consent was obtained from a legal guardian for study participants under 16 years.
: All participants signed a document of informed consent.
: The authors declare that they have no competing interests.