An error occurred in the paper by Fisher et al (Gut 2000;46:534–539). Levels of protein C, protein S, antithrombin and factor VII were tenfold too high throughout the manuscript. In the Methods section, normal ranges for protein C, protein S, antithrombin and factor VII should have read 66–122 U/dl, 68–146 U/dl, 75–140 U/dl, and 50–150 U/dl. Similar corrections should apply throughout the Results section and in the legend to figure 1. This was an editorial error for which Gutapologises.