Compliance with ethical standards

Guarantor
The scientific guarantor of this publication is Zhuozhi Dai.

Conflict of interest
One of the authors of this manuscript (Yuting Liao) is an employee of GE Healthcare. The remaining authors declare no relationships with any companies whose products or services may be related to the subject matter of the article.

Statistics and biometry
One of the authors, Dr. Yuting Liao, has significant statistical expertise.

Informed consent
Written informed consent was waived by the Institutional Review Board.

Ethical approval
Institutional Review Board approval was obtained.

Methodology
• retrospective
• case-control study
• multi-center study