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Microbiological characterization of Streptococcus pneumoniae and non-typeable Haemophilus influenzae isolates as primary causes of acute otitis media in Bulgarian children before the introduction of conjugate vaccines.
Setchanova LP, Kostyanev T, Alexandrova AB, Mitov IG, Nashev D, Kantardjiev T. Setchanova LP, et al. Among authors: alexandrova ab. Ann Clin Microbiol Antimicrob. 2013 Mar 25;12:6. doi: 10.1186/1476-0711-12-6. Ann Clin Microbiol Antimicrob. 2013. PMID: 23531034 Free PMC article.