| Institution: | (1) Department of Medicine, Peijas Hospital, Vantaa, Helsinki, Finland;(2) Department of Infectious Disease Surveillance and Control, National Institute for Health and Welfare, Helsinki, Finland;(3) Department of Medicine, Helsinki University Central Hospital, Helsinki, Finland;(4) Department of Medicine, Kuopio University Hospital, Kuopio, Finland;(5) Department of Internal Medicine, Tampere University Hospital, Tampere, Finland;(6) Department of Medicine, Turku University Central Hospital, Turku, Finland;(7) Department of Infection Control, Oulu University Hospital, Oulu, Finland |
