Balwani M, Desnick RJ. The porphyrias: advances in diagnosis and treatment. Blood. 2012;120(23):4496-4504.

On page 4499 in the 29 November 2012 issue, “/kg” was omitted from the standard regimen in the sixth sentence of the paragraph titled “Treatment of acute attacks.” The sentence reads, “The standard regimen is 3-4 mg of heme in the form of lyophilized hematin (Panhematin, Lundbeck Pharmaceuticals), heme albumin (hematin reconstituted with human albumin), or heme arginate (Orphan Europe), infused daily for 4 days.³” The sentence should have read, “The standard regimen is 3-4 mg/kg of heme in the form of lyophilized hematin (Panhematin, Lundbeck Pharmaceuticals), heme albumin (hematin reconstituted with human albumin), or heme arginate (Orphan Europe), infused daily for 4 days.³”