Correction: Screening for a new primary cancer in patients with existing metastatic cancer: a retrospective cohort study Correction

Errors occurred in an article published on Nov. 7, 2018.¹ In Table 1, the colonoscopy value for patients with breast cancer should have been 2.7–3.1. Also, the flexible sigmoidoscopy and colonoscopy values for patients with breast cancer should have included the symbol linking to the footnote “*Small cell sizes were suppressed to preserve patient anonymity.” These errors have been corrected at cmajopen.ca.