Simons, T.
Söderlund, T.
Handolin, L.
Article History
Received: 11 September 2016
Accepted: 29 December 2016
First Online: 27 January 2017
Compliance with ethical standards
: Ethical approval for the current study was obtained from the Helsinki University Central Hospital review board.
: Tomi Simons, Tim Söderlund and Lauri Handolin declare that they have no conflict of interest.
Free to read: This content has been made available to all.