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Surveillance of severe neonatal hyperbilirubinemia: a view from south of the border.
Tips for learners of evidence-based medicine: 5. The effect of spectrum of disease on the performance of diagnostic tests.
Tips for learners of evidence-based medicine: 3. Measures of observer variability (kappa statistic).
Tips for learners of evidence-based medicine: 2. Measures of precision (confidence intervals).