Funding for this research was provided by:
Key projects of health industry in Tianjin (16KG142)
Received: 23 July 2018
Accepted: 30 April 2019
First Online: 15 May 2019
Ethics approval and consent to participate
: The study was approved by Ethics Committee of Tianjin Hospital. The written informed consent was obtained from the patients before death or from next of kin to use the specimens for this study.
: Not applicable.
: Author Haijing Huang declares that she has no conflict of interest.
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