Article History
Received: 10 February 2020
Accepted: 17 February 2020
First Online: 22 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This retrospective study of existing patient data and images was approved by the institutional review board of Union Hospital, Tongji Medical College, Huazhong University of Science and Technology. The requirement for informed consent was waived.
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