Bussel et al. Safety and efficacy of long-term treatment with romiplostim in thrombocytopenic patients with chronic ITP. Blood. 2009;113:2161-2171.

On page 2161 in the March 5, 2009, issue, in the third sentence of the abstract, the platelet count “less than 5 × 10⁹/L” is incorrect. The sentence should read: “This ongoing, long-term open-label, single-arm study investigated safety and efficacy in patients who completed a previous romiplostim study and had platelet counts less than or equal to 50 × 10⁹/L.”