[1] Univ Geneva, Comp Sci Ctr CUI, Qual Life Technol Lab, Geneva, Switzerland
[2] Univ Copenhagen, Dept Comp Sci DIKU, Human Ctr Comp Grp, Copenhagen, Denmark
[3] Stanford Univ, Innovat Surg, Stanford, CA 94305 USA
[4] Univ Lugano, Inst Commun & Hlth, Lugano, Switzerland