Text and Data Mining valid from 2018-11-24
Received: 2 September 2018
Accepted: 16 November 2018
First Online: 24 November 2018
Compliance with ethical standards
: First author Dr. Eno Lavrysen declares that he has no conflict of interest. Second author Prof. Dr. Tomas Menovsky declares that he has no conflict of interest.
: This article does not contain any studies with human participants performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.