Funding for this research was provided by:
Van Rens Foundation (VRF2017-009)
Text and Data Mining valid from 2019-08-22
Received: 21 December 2018
Accepted: 15 August 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: Not applicable, as all data was received completely anonymous.
: Not applicable.
: The authors declare that they have no competing interests.