An error has come to light in the review by Wonget al (Gut1999;44:890–5). On page 892, column 1, paragraph 2, “In general TFF1 is associated with MUC6 expression, TFF2 with MUC5AC and TFF3 with MUC2 (Longman et al, personal communication)” should read “In general TFF1 is associated with MUC5AC expression, TFF2 with MUC6 and TFF3 with MUC2 (Longman et al, personal communication)”. The authors regret any confusion this may have caused.