Zhang, Wenqiang
Luan, Rongsheng
Article History
Received: 16 September 2019
Accepted: 28 November 2019
First Online: 6 January 2020
Ethics approval and consent to participate
: This study used public data from CHARLS to analyse. The blood-based biomarker sample collection study was granted by the ethical review committee (IRB) of Peking University (IRB 00001052–11014). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.