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Maria Nuova Hospital, Reggio Emilia, the Regional Hospital, Institute of Infectious Diseases, Bolzano and the Infectious Diseases Clinic, Bari, Italy. See Appendix for details","Istituto Superiore di Sanit\u00e0 ,"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"the Laboratory of Epidemiology and Biostatistics, National Institute of Health, Rome, Italy, the Department of Epidemiology, The Johns Hopkins School of Hygiene and Public Health, Baltimore, Maryland, USA, the Amedeo di Savoia Hospital, Institute of Infectious Diseases, Turin, the National Research Council, the San Raffaele Hospital, Milan, the Arcispedale S. Maria Nuova Hospital, Reggio Emilia, the Regional Hospital, Institute of Infectious Diseases, Bolzano and the Infectious Diseases Clinic, Bari, Italy. 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