[1] Inselspital Bern, Bern Univ Hosp, Univ Dept Anaesthesiol & Pain Therapy, Bern, Switzerland
[2] Univ Bern, Div Clin Epidemiol & Biostat, ISPM, Bern, Switzerland
[3] Inselspital Bern, Bern Univ Hosp, CTU Bern, Bern, Switzerland
[4] Aalborg Univ, Dept Hlth Sci & Technol, Ctr Sensory Motor Interact, Aalborg, Denmark