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Long-term dual antiplatelet therapy after percutaneous coronary intervention
  1. Kishore J Harjai1,
  2. Judith Boura2
  1. 1Guthrie Clinic, Sayre, Pennsylvania, USA
  2. 2William Beaumont Hospital, Royal Oak, Michigan, USA
  1. Correspondence to Kishore J Harjai, Director, Cardiac Catheterization Laboratories, Guthrie Health System, One Guthrie Square, Sayre, PA 18840, USA; harjai_kishore{at}

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The Authors' reply: There are two different approaches to using the propensity score in statistical analyses. The first method, propensity score-adjusted multivariate analysis, involves the use of the …

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