Funding for this research was provided by:
Linköping University
Article History
Received: 24 October 2017
Revised: 26 January 2018
Accepted: 30 January 2018
First Online: 26 March 2018
Compliance with ethical standards
:
: The scientific guarantor of this publication is Hans Ringertz.
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: Written informed consent was not required for this study because it did not involve human subjects
: Institutional Review Board approval was not required because the study did not involve patients.
: • multicentre study• based on a multispecialty survey