Zhang, Nana
Li, Jian
Zhang, Panpan
Yang, Xiaodi
Sun, Chong
Article History
Received: 28 June 2019
Accepted: 13 August 2019
First Online: 12 September 2019
Compliance with ethical standards
: The study was approved by the ethic committee of Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Nanjing Normal University, and all the experiments were carried out in strict accordance with the ethical standards.
: The authors declare that they have no conflict of interest.