Document is current
Any future updates will be listed below
-
Authors
- License Information
-
More Information
Article History
Received: 2 January 2019
Accepted: 3 May 2019
First Online: 14 May 2019
Ethics approval and consent to participate
: This study was conducted in accordance with the declaration of Helsinki. This study was conducted with approval from the Ethics Committee of Beijing Chaoyang Hospital. Written informed consent was obtained from all participants.
: Not applicable.
: Not applicable.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
