Received: 17 July 2019
Accepted: 21 February 2020
First Online: 28 February 2020
Ethics approval and consent to participate
: The study was performed following the guidelines of the declaration of Helsinki and the code of conduct for scientific research of our institute. The local ethics committee waved the need for approval (HAN University of Applied Sciences Faculty of Health, Behaviour and Society Ethical Advisory Board; EACO 71.05/17).
: Not applicable.
: The authors declare that they have no competing interests.