Gu, Xiuzhu http://orcid.org/0000-0003-2641-1740
Liu, Hu-chen http://orcid.org/0000-0003-4566-2107
Itoh, Kenji http://orcid.org/0000-0002-7480-2853
Funding for this research was provided by:
Japan Society for the Promotion of Science (No. 15K16291)
Article History
Received: 16 January 2018
Accepted: 20 June 2018
First Online: 26 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Informed consent was obtained from respondents as described in “Survey sample” section.