Mahabir S, Willett WC, Friedenreich CM, Lai GY, Boushey CJ, Matthews CE, Sinha R, Colditz GA, Rothwell JA, Reedy J, Patel AV, Leitzmann MF, Fraser GE, Ross S, Hursting SD, Abnet CC, Kushi LH, Taylor PR, Prentice RL. Research Strategies for Nutritional and Physical Activity Epidemiology and Cancer Prevention. Cancer Epidemiol Biomarkers Prev. 2018 03; 27(3):233-244.