Shen, Gang
Zhang, Chuanguang
Li, Junfeng
Zhang, Jing
Liu, Yongdong
Guan, Zheming
Hu, Qiang
Funding for this research was provided by:
Weifang Science and Technology Bureau (2016YX001.)
Article History
Accepted: 23 August 2018
First Online: 27 August 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: For this type of study formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.