SmaI-PFGE pattern and dendrogram of the ceftobiprole-resistant MRSA strains. Profiles were analyzed with BioNumerics software version 7.0 (Applied Maths Scientific Software Development, Sint-Martens-Latem, Belgium). The dendrogram was built by applying the Dice similarity coefficient, with 1.5% optimization and 2.0% tolerance. Clustering was obtained using the unweighted pair group method with arithmetic mean. Opt, optimization; Tol, tolerance; H, minimum height; S, minimum surface.