Gao, Haijuan
Okoror, Titilayo A.
Hyner, Gerald C.
Article History
First Online: 1 October 2016
Compliance with Ethical Standards
:
: The first author declares that he/she has no conflict of interest. The second author declares that he/she has no conflict of interest. The third author declares that he/she has 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.
: All individual participants included in the study provided informed consent.