Source: https://www.researchgate.net/profile/Nicolai-Goettel/publication/311170918_L'etat_confusionnel_aigu_postoperatoire_depistage_rapide_prevention_et_traitement/links/583ec8ce08ae8e63e617d168/Letat-confusionnel-aigu-postoperatoire-depistage-rapide-prevention-et-traitement.pdf