Text and Data Mining valid from 2019-11-27
Received: 2 September 2019
Accepted: 13 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: Ethical approval from the Ethics Committee of Xiangya Hospital affiliated to Central South University was obtained for this study. Each author certifies that all investigations were conducted in conformity with ethical principles. Written informed consent was obtained from all participants.
: All patients signed informed consent forms to publish their personal details in this article.
: The authors declare that they have no competing interests.