By Job Gutteling, OLVG, jwa.gutteling@gmail.com | Heleen Nelissen, OLVG, h.e.nelissen@olvg.nl | Marijke Vulink, OLVG, m.vulink@olvg.nl | Igor Paulussen, Philips Research, Eindhoven (NL), Department of Anaesthesiology, Resuscitation and Pain Management, Elisabeth-TweeSteden Hospital, Tilburg, The Netherlands, i.paulussen@etz.nl | Gerrit Jan Noordergraaf, Elisabeth-TweeSteden Hospital, Tilburg, The Netherlands, g.noordergraaf@gmail.com