Qin, Lei
Li, Angie
Qu, Jinrong
Reinshagen, Katherine
Li, Xiang
Cheng, Su-Chun
Bryant, Annie
Young, Geoffrey S.
Article History
Received: 29 September 2017
Accepted: 13 December 2017
First Online: 30 January 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this retrospective study consent is not required.