Low prevalence of fluoroquinolone resistant strains and resistance precursor strains in Streptococcus pneumoniae from patients with community-acquired pneumonia despite high fluoroquinolone usage - Pletz, M W; van der Linden, M; von Baum, H; Duesberg, C B; Klugman, K P; Welte, T (Int J Med Microbiol, 2011)
; CAPNETZ study group.