1. Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
2. Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland
3. CGI Suomi Oy, Helsinki, Finland
4. Department of Respiratory and Sleep Medicine, Sleep Disorders Centre, Princess Alexandra Hospital, Brisbane, Queensland, Australia
5. Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
6. School of Information Technology and Electrical Engineering, University of Queensland, Brisbane, Queensland, Australia