Correction

In the September 2012 article: Sheron N, Moore M, Ansett S, et al. Developing a ‘traffic light’ test with potential for rational early diagnosis of liver fibrosis and cirrhosis in the community. Br J Gen Pract 2012; DOI: 10.3399/bjgp12X654588, the algorithm “predicted probability (p) = exp(HA * 0.015 + P3NP * 0.447 + (PLT * −0.005) − 0.611)/(1 + exp(HA * 0.015 + P3NP * 0.447 + (PLT * −0.005) − 0.661))” should have stated “predicted probability (p) = exp(HA * 0.015 + P3NP * 0.447 – PLT * 0.005 + −0.611) / (1 + exp(HA * 0.015 + P3NP * 0.447 – PLT * 0.005 + −0.611))”. The online version has been corrected.