Galliker, Sibylle http://orcid.org/0000-0002-7687-5247
Nyffenegger, Denise
Semmer, Norbert K. http://orcid.org/0000-0002-7686-6914
Elfering, Achim http://orcid.org/0000-0003-4274-0261
Article History
First Online: 15 May 2020
Conflict of interest
: S. Galliker, D. Nyffenegger, N.K. Semmer and A. Elfering declare that they have no competing interests.