Text and Data Mining valid from 2019-06-13
Received: 24 February 2019
Accepted: 30 May 2019
First Online: 13 June 2019
Ethics approval and consent to participate
: The Ethics Committee of the First People’s Hospital of Zhaoqing approved this study before the admission of patients and controls on Feb 11th, 2012 (Approval NO. 20120211FPHZQ322). All procedures performed in studies involving human participants were in accordance with the ethical standards of the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. All patients and healthy controls signed informed consent.
: Not applicable.
: The authors declare that they have no competing interests.