Van den Stock, Ady
Article History
Received: 20 August 2020
Revised: 3 October 2020
Accepted: 6 October 2020
First Online: 11 November 2020
Conflict of interest
: The author has declared no conflict of interest.
: I hereby declare that this manuscript is the result of my independent creation under the reviewers’ comments. Except for the quoted contents, this manuscript does not contain any research achievements that have been published or written by other individuals or groups. I am the only author of this manuscript. The legal responsibility of this statement shall be borne by me.
: Not applicable.
: Not applicable.
: The only author.