Text and Data Mining valid from 2018-04-20
Received: 14 September 2017
Accepted: 4 April 2018
First Online: 20 April 2018
Ethics approval and consent to participate
: The clinical study proposal was approved by the Ethical Committee of the Third Hospital of Hebei Medical University. Informed consent to participate in the study was obtained from the patients, and written consent was obtained from the patients before they died to use their knees after death.
: The authors declare that they have no competing interests.
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