Funding for this research was provided by:
the National Natural Science Foundation of China (No. 81772346, 81701717)
the Science and Technology Research and Development Program of Shaanxi province (2017SF-141, 2016SF-057)
Received: 9 January 2018
Accepted: 28 March 2019
First Online: 9 April 2019
Change Date: 19 August 2020
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/S12891-020-03555-0
: Miao Li, Jue Jiang, Qi Zhou: Department of Ultrasound, the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an Shaanxi, 710,004, P. R China.Chen Zhang: The First Department of Orthopaedics, the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an Shaanxi, 710,004, P. R China.
: Approval was obtained from the Biomedical Ethics Group of the medical department of Xi’an Jiaotong University (No. 2014–003) and the procedures were in accordance with the Helsinki Declaration of 1975, which was revised in 1983. This study has been registered in Chinese Clinical Trial Registry (ChiCTR-ROC-17014068) and designed prospectively from December 2014 to October 2016. The written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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