This article corrects:

  1. Epidemiology of immune thrombocytopenic purpura in the General Practice Research Database Volume 145, Issue 2, 235–244, Article first published online: 24 February 2009

In Schoonen et al (2009), it was stated that 12 patients received a quinidine prescription and none of the patients received a quinine prescription in the 60 days before their ITP diagnosis. This is not correct. 12 patients received a quinine prescription, whereas none of the patients received a quinidine prescription.