Fig. 1From: Allopurinol reduces the risk of myocardial infarction (MI) in the elderly: a study of Medicare claimsFlow-chart of study cohort of incident allopurinol users from 2006 to 2012 for a baseline of 365 days. A + B + C-HMO, DC, MI myocardial infarction, Nb, NE number of episodes, Np, Number of prescriptions, Nb, Number of beneficiaries Back to article page