Funding for this research was provided by:
Natural Science Foundation of Tianjin ((No. 17JCQNJC13000)
Article History
Received: 16 July 2018
Accepted: 7 November 2018
First Online: 21 November 2018
Compliance with ethical standards
:
: The authors have no actual or potential conflicts of interest to declare.
: This study was approved by the hospital ethics committee.
: All patients gave informed consent.
: This study was supported by the Foundation of Tianjin Science and Technology Commission (No. 17JCQNJC13000) and the Foundation of Tianjin Union Medical Center (2016YJ029).