Wang, Ruoxi
Lan, Ling
Xu, Li
Zhu, Bo
Huang, Yuguang
Article History
Received: 10 March 2021
Accepted: 12 May 2021
First Online: 16 June 2021
Declarations
:
: This study was conducted in accordance with the Declaration of Helsinki. Before data collection, the study was approved by the Medical Ethics Committee of Peking Union Medical College Hospital and the registration number was S-K1301. A waiver of consent was approved by the institutional review board of Medical Ethics Committee of Peking Union Medical College Hospital because it was a retrospective analysis.
: Not applicable.
: The authors state no competing interests.