Molecular characterization of erythromycin-resistant clinical isolates of the four major antimicrobial-resistant Spanish clones of Streptococcus pneumoniae (Spain23F-1, Spain6B-2, Spain9V-3, and Spain14-5)

1. Marimón, J.M.
2. Iglesias, L.
3. Vicente, D.
4. Pérez-Trallero, E.