Leufkens, AM, van Duijnhoven, FJB, Boshuizen, HC, Siersema, PD, Kunst, AE, Mouw, T, Tjonneland, A, Olsen, A, Overvad, K, Boutron-Ruault, MC, Clavel Chapelon, F, Morois, S, Krogh, V, Tumino, R, Panico, S, Polidoro, S, Palli, D, Kaaks, R, Teucher, B, Pischon, T, Peeters, PHM, Wareham, N, Gallo, V, Riboli, E, et al., X & Bueno de Mesquita, HB 2012, '
Educational level and risk of colorectal cancer n EPIC with specific reference to tumor location',
International Journal of Cancer, vol. 103, no. 3, pp. 622-630. <
http://www.ncbi.nlm.nih.gov/pubmed/21412763>