Article History
Received: 6 January 2019
Accepted: 26 February 2019
First Online: 16 March 2019
Compliance with ethical standards
:
: This manuscript has not been published nor submitted for publication elsewhere. All authors have contributed significantly, and agree with the content of the manuscript. The authors reported no proprietary or commercial interest in any product mentioned or concept discussed in this article.
: This study has been approved by the Institutional Review Board of Changzhou First People’s Hospital ethics committee, and has been performed according to the ethical standards laid down in the 1964 Declaration of Helsinki.
: Informed consent was obtained from all individual participants included in the study.