Funding for this research was provided by:
Natural Science Foundation of China (81874017)
Cuiying Science and Technology Innovation Project of Lanzhou University Second Hospital (CY2017-ZD02; CY2017-QN12)
Research Project of Gansu Province Chinese Medicine Administration (GZK-2017-51)
Received: 29 September 2018
Accepted: 16 November 2018
First Online: 6 December 2018
Ethics approval and consent to participate
: Ethics approval for this study was obtained from the Institutional Review Board of the Lanzhou University Second Hospital, Lanzhou, Gansu Province, China. The informed consent was waived by the Ethics Committee as the study was performed using the data and images without the patients’ identification information and this is a retrospective study.
: Not applicable.
: The authors declare that they have no competing interests.
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