Jiang, Che http://orcid.org/0000-0003-3535-2156
Wang, Jiajia
Article History
Received: 23 November 2018
Accepted: 24 January 2019
First Online: 31 January 2019
Compliance with ethical standards
: Che Jiang and Jiajia Wang declared no conflict of interest. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.