Carter, K., Hutchings, H. A., Elwyn, G., & Hutchings, H. (2009). The Two-Week Rule for NHS Gastrointestinal Cancer Referrals: A Systematic Review of Diagnostic Effectiveness. The Open Colorectal Cancer Journal, 2(1), pp. 27-33. doi:10.2174/1876820200902010027

Carter, Kym, Hayley A. Hutchings, Glyn Elwyn, and Hayley Hutchings. "The Two-Week Rule for NHS Gastrointestinal Cancer Referrals: A Systematic Review of Diagnostic Effectiveness." The Open Colorectal Cancer Journal 2, no. 1 (2009): 27-33.

Carter, Kym, Hayley A. Hutchings, Glyn Elwyn, and Hayley Hutchings. "The Two-Week Rule for NHS Gastrointestinal Cancer Referrals: A Systematic Review of Diagnostic Effectiveness." The Open Colorectal Cancer Journal 2.1 (2009): 27-33.