title: Light and shade behind the opt-out system for the HIV screening.
authors.affiliation: University of Milan, Faculty of Medicine, Department of Health Sciences, Milan Italy; IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy. Electronic address: silvia.riva@unicatt.it.
authors.forename: Silvia
authors.initials: S
authors.lastname: Riva
authors.affiliation: IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Nobili
authors.affiliation: University of Milan, Faculty of Medicine, Department of Health Sciences, Milan Italy; Applied Research Unit for Cognitive and Psychological Science, European Institute of Oncology (IEO), Milan, Italy.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Pravettoni
mesh_terms: D005260:Female; D015658:HIV Infections / Q000175:diagnosis*; D006293:Health Promotion; D006801:Humans; D008297:Male