title: Defining the denominator to deal with the iceberg and not just its tip.
authors.affiliation: Struttura Complessa di Anestesia e Rianimazione 2, Dipartimento Chirurgico Polispecialistico, Azienda Ospedaliera "Ospedale Niguarda Ca' Granda", Milan, Italy - andrea.degasperi@ospedaleniguarda.it.
authors.forename: Andrea
authors.initials: A
authors.lastname: De Gasperi
mesh_terms: D006801:Humans; D046448:Ice Cover