Question of Intervention In African-‐American female adolescents with hepatitis B (P), how does acetaminophen (I) compared to ibuprofen (C) affect liver function (O)? Question of Diagnosis or Diagnostic Test In middle aged males with suspected myocardial infarction (P), are serial 12 lead ECGs (I) compared to one initial 12 lead ECG (C) more accurate in […]