Lund, Anja
Rundqvist, Karin
Nilsson, Erik
Yu, Liyang
Hagström, Bengt
Müller, Christian http://orcid.org/0000-0001-7859-7909
Article History
Received: 24 September 2017
Revised: 28 December 2017
Accepted: 11 January 2018
First Online: 22 March 2018
Competing interests
: The authors declare no competing financial interests.