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van de Beek D, de Gans J, Tunkel AR, Wijdicks EF (5 January 2006). "Community-Acquired Bacterial Meningitis in Adults". New England Journal of Medicine. 354 (1): 44–53. doi:10.1056/NEJMra052116. ISSN0028-4793. PMID16394301.
Claverys JP, Prudhomme M, Martin B (2006). "Induction of competence regulons as a general response to stress in gram-positive bacteria". Annu. Rev. Microbiol. 60: 451–75. doi:10.1146/annurev.micro.60.080805.142139. PMID16771651.
Nilsson P, Laurell MH (2001). "Carriage of penicillin-resistant Streptococcus pneumoniae by children in day-care centers during an intervention program in Malmo, Sweden". The Pediatric Infectious Disease Journal. 20 (12): 1144–9. doi:10.1097/00006454-200112000-00010. PMID11740321.
Block SL, Harrison CJ, Hedrick JA, Tyler RD, Smith RA, Keegan E, Chartrand SA (1995). "Penicillin-resistant Streptococcus pneumoniae in acute otitis media: risk factors, susceptibility patterns and antimicrobial management". The Pediatric Infectious Disease Journal. 14 (9): 751–9. doi:10.1097/00006454-199509000-00005. PMID8559623.
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van de Beek D, de Gans J, Tunkel AR, Wijdicks EF (5 January 2006). "Community-Acquired Bacterial Meningitis in Adults". New England Journal of Medicine. 354 (1): 44–53. doi:10.1056/NEJMra052116. ISSN0028-4793. PMID16394301.