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Frequency of mutation to rifampin resistance in Streptococcus pneumoniae clinical strains: hexA and hexB polymorphisms do not account for hypermutation.
Morosini MI, Baquero MR, Sánchez-Romero JM, Negri MC, Galán JC, del Campo R, Pérez-Díaz JC, Baquero F. Morosini MI, et al. Among authors: negri mc. Antimicrob Agents Chemother. 2003 Apr;47(4):1464-7. doi: 10.1128/AAC.47.4.1464-1467.2003. Antimicrob Agents Chemother. 2003. PMID: 12654695 Free PMC article.