Janssen, C. A. http://orcid.org/0000-0001-6359-916X
Oude Voshaar, M. A. H.
Vonkeman, H. E.
Krol, M.
van de Laar, M. A. F. J.
Funding for this research was provided by:
GrĂ¼nenthal B.V.
Article History
Received: 24 March 2018
Revised: 19 April 2018
Accepted: 24 April 2018
First Online: 2 May 2018
Compliance with ethical standards
: Given the nature of the study, and in accordance with the Dutch Medical Research Involving Human Subjects Act, no approval by the ethical review board, or formal consent, was required.
: M.A.F.J. van de Laar, MD, PhD received consultancy fees from GrĂ¼nenthal B.V. All other authors declare they have no conflicts of interest.