Received: 7 April 2021
Accepted: 9 June 2021
First Online: 14 June 2021
: This project was approved by the institutional review board central committee of Fuwai Hospital, National Center for Cardiovascular Diseases of China (approval No.: 2012431) and conducted in accordance with the tenets of the Declaration of Helsinki. The CAMI registry study group maintains the institutional review board–approved protocol that describes the methods used to protect the privacy of patients and maintain confidentiality of data collected. Written informed consent was obtained from eligible patients before registration. However, to avoid registration biases associated with informed consent and ensure all eligible patients being registered, investigators can register patients without providing informed consent. However, the data were anonymized, and private information was omitted.
: Not applicable.
: All authors declared no competing financial interests.