Article History
First Online: 18 September 2018
Compliance with ethical standards
:
: Ethics approval was obtained from the ethics committees at the University of Technology Sydney, Australia (ref no. ETH16-1033) and the Medical University of Gdansk, Poland (ref no. NKBBN/424/2016).
: The authors have no conflicts of interest.
: This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.