Frøkjær, Jens Brøndum http://orcid.org/0000-0001-8722-0070
Jensen, Weronika Nyholm
Holt, Gitte
Omar, Halgurd Khalid
Olesen, Søren Schou
Article History
First Online: 29 May 2018
Compliance with ethical standards
: All authors have no conflicts of interest. No funding was received for this study. The study involves humans and was approved by the Danish Data Protection Agency, and was conducted in accordance with the ethical standards of the institutional research committee and Helsinki Declaration.