Erratum to Zöller et al. “Familial risk of venous thromboembolism in first-, second- and third-degree relatives: a nationwide family study in Sweden” (Thromb Haemost 2013; 109: 458–463)

In the original article by Zöller B, Ohlsson H, Sundquist J, Sundquist K. “Familial risk of venous thromboembolism in first-, second- and thirddegree relatives: a nationwide family study in Sweden” (Thromb Haemost 2013; 109: 458–463) the authors used only data from four sources. Thus, the sentence on page 459 should be “Our database contains data from four sources.” And the numbering should be accordingly 1, 2, 3 and 4, and not 1, 2, 3, and 5. The authors apologise for this error.