title: Letter to the editor: more ghosts more business.
authors.affiliation: a Section of the History of Medicine , University of Milano-Bicocca , Monza , Italy.
authors.forename: Michele A
authors.initials: MA
authors.lastname: Riva
authors.forename: Lucio
authors.initials: L
authors.lastname: Tremolizzo
mesh_terms: D005260:Female; D006801:Humans; D020188:Sleep Paralysis