VIGDÍS VALA VALGEIRSDÓTTIR, MSc; ÓMAR I. JÓHANNESSON, PhD; and ÁRNI KRISTJÁNSSON, PhD, are affiliated with the Faculty of Psychology, School of Health Sciences, University of Iceland, Reykjavik, Iceland.
VIGDÍS VALA VALGEIRSDÓTTIR, MSc; JÓNA SIGRÚN SIGURÐARDÓTTIR, MSC; and ÁSGEIR ALEXANDERSSON, MD, MSc, are affiliated with Össur hf, Reykjavik, Iceland.
ÁRNI KRISTJÁNSSON, PhD, is affiliated with the National Research University Higher School of Economics, Moscow, Russian Federation.
Disclosure: The authors declare no conflict of interest.
Funding: The research described was funded by The Icelandic Centre for Research (RANNIS), grant number 195657-051, and Össur hf, Iceland, which further provided technical support.
Correspondence to: Vigdís Vala Valgeirsdóttir, MSc, Sæmundargata 12, 101 Reykjavík, Iceland; email: [email protected]