Secular trends in nosocomial bloodstream infections: antibiotic-resistant bacteria increase the total burden of infection. di Ammerlaan, H, Harbarth, S, Buiting, A, Crook, D, Fitzpatrick, F, Hanberger, H, Herwaldt, L, van Keulen, P, Kluytmans, J, Kola, A, Kuchenbecker, R, Lingaas, E, Meessen, N, Morris-Downes, M, Pottinger, J, Rohner, P, dos Santos, R, Seifert, H, Wisplinghoff, H, Ziesing, S, Walker, A, Bonten, M