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CI of thrombosis according to the IPSET-thrombosis (A, IPSET), revised IPSET-thrombosis (B, IPSET-Rev), and classical risk stratification (C, classic) in 1366 patients prospectively followed from the Spanish Registry of Essential Thrombocythemia. Patients were censored when they change to high-risk category or at 10 years after diagnosis. CI = cumulative incidence; IPSET-thrombosis = International Prognostic Score of Thrombosis in Essential Thrombocythemia.
