Wahl, Joel http://orcid.org/0000-0002-7904-9637
Freyss, Joel http://orcid.org/0000-0001-8349-1762
von Korff, Modest http://orcid.org/0000-0002-2549-8672
Sander, Thomas http://orcid.org/0000-0003-4019-1959
Article History
Received: 1 November 2018
Accepted: 23 July 2019
First Online: 7 August 2019
Competing interests
: None of the authors have any competing interests.