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Quantitative lytA rtPCR from sputum and nasopharyngeal swabs in relation to pneumococcal and nonpneumococcal pneumonia. Plus signs represent means; lengths of boxes, interquartile ranges between the 25th and 75th percentiles; horizontal lines in boxes, medians; and whiskers, minimum and maximum values. NP, nasopharyngeal; composite diagnostic standard, positive blood culture, induced-sputum culture or Gram stain, urine antigen test, or whole-blood lytA rtPCR.
