Files in this Data Supplement:

• Supplemental file 1 - Table S1, nucleotide sequence differences between the cps loci analyzed in this study and those of other strains of the same serotype
  MS Word document, 57K.
• Supplemental file 2 - Fig. S1, cps loci and structures (where available) of serotypes that do not fall into a subcluster
  Zipped PDF document, 1.1MB.
• Supplemental file 3 - Fig. S1, part two
  Zipped PDF document, 691K.