[1] Univ Twente, Fac Elect Engn Math & Comp Sci, Biomed Signals & Syst Grp, Enschede, Netherlands
[2] Univ British Columbia, Dept Anesthesiol Pharmacol & Therapeut, Vancouver, BC, Canada
[3] Univ British Columbia, Dept Elect & Comp Engn, Vancouver, BC, Canada