Correction

In the November 2011 article by Hippisley-Cox J, Coupland C. Identifying patients with suspected lung cancer in primary care: derivation and validation of an algorithm. Br J Gen Pract 2011; DOI: 10.3399/bjgp11X606627, the Results section showed two incorrect numbers. In the second paragraph it states ‘A total of 1 243 329 patients’; this should have been ‘A total of 1 342 329 patients’. It also states ‘… 1 342 329 patients for analysis.’; this should have been ‘… 1 267 151 patients for analysis’. The errors have no effect on any of the results or conclusions. The corrected version will be published online.