Guo, Chunli
Huang, Min
Shi, Chunjie
Xi, Yonghui
Chapter History
First Online: 10 April 2020
Compliance with Ethical Standards
: <b>Funding</b>: This study is funded by National Natural Science Foundation of China (grant 61675029, 61308081).
: <b>Conflict of Interest</b>: The authors declare that they have no conflict of interest.
: <b>Ethical approval</b>: All procedures performed in studies involving human participants were in accordance with the ethical standards of the school of printing and packaging engineering, Beijing Institute of Graphic Communication and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: <b>Informed consent</b>: Informed consent was obtained from all individual participants included in the study.