The changing epidemiology of Staphylococcus aureus bloodstream infection: a multinational population-based surveillance study

K B Laupland, O Lyytikäinen, M Søgaard, K J Kennedy, Inge Jenny Dahl Knudsen, Christian Østergaard Andersen, J C Galbraith, L Valiquette, G Jacobsson, P Collignon, Henrik Carl Schønheyder, for the International Bacteremia Surveillance Collaborative