He, S.
Blombäck, M.
Boström, F.
Wallen, H.
Svensson, J.
Östlund, A.
Article History
First Online: 21 March 2018
Compliance with ethical standards
:
: All the authors have no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.
: The study involves human patients, which was approved by the regional ethical committee.