Received: 19 March 2022
Accepted: 19 September 2022
First Online: 18 October 2022
: This project was approved by the institutional review board of the ethics committee of Fu Xing Hospital, Peking Union Medical College Hospital, Beijing Tongren Hospital, Beijing Tiantan Hospital, Beijing Ditan Hospital, Beijing Chaoyang Hospital, Peking University Third Hospital, Peking University First Hospital, Peking University People’s Hospital, China-Japan Friendship Hospital, The 309th Hospital of Chinese People’s Liberation Army, Beijing Shijitan Hospital, Fuwai Hospital, Air Force General Hospital of Chinese People’s Liberation Army, First Affiliated Hospital of General Hospital of People’s Liberation Army, Navy General Hospital, Luhe Teaching Hospital, Beijing Anzhen Hospital, Beijing Hospital, General Hospital of Armed Police Forces, The General Hospital of People’s Liberation Army, Beijing YouAn Hospital, HuaXin Hospital, Beijing Shunyi Hospital, Beijing Geriatric Hospital and Beijing No.6 Hospital. We confirm that all methods were carried out in accordance with relevant guidelines and regulations. As an observational study, participants did not need written informed consent to participate. Therefore, we obtained the informed consent exemption of the above ethics committee.
: Not applicable.
: The authors declare that they have no conflicts of interest.