Hull, M. A., Sprange, K., Hepburn, T., Tan, W., Shafayat, A., Rees, C. J., …seAFOod Collaborative Group. (2018). Eicosapentaenoic acid and aspirin, alone and in combination, for the prevention of colorectal adenomas (seAFOod Polyp Prevention trial): a multicentre, randomised, double-blind, placebo-controlled, 2 × 2 factorial trial. Lancet, 392(10164), 2583-2594. https://doi.org/10.1016/S0140-6736%2818%2931775-6