Funding for this research was provided by:
China Scholarship Council (201708080019)
Technische Universität Darmstadt
Article History
Received: 23 February 2021
Accepted: 28 June 2021
First Online: 8 July 2021
Declarations
:
: Ethical approval and consent to participate were not required as this is a literature review.
: Not applicable.
: No potential conflict of interest was reported by the authors.