Plasma levels of six carotenoids in nine European countries: report from the European Prospective Investigation into Cancer and Nutrition (EPIC).

Al-Delaimy, W.K.; Kappel, A.L.; Ferrari, P.; Slimani, N.; Steghens, J.P.; Bingham, S; Johansson, I.; Wallstrom, P.; Overvad, K.; Tjonneland, A.; Key, T.J.; Welch, A.A.; Bueno de Mesquita, H.B.; Peeters, P.H.M.; Boeing, H.H.; Linseisen, J.; Clavel-Chapelon, F.; Guibout, C.; Navarro, C.; Quiros, J.R.; Palli, D.; Celentano, E.; Trichopoulou, A.; Benetou, V.; Kaaks, R.; Riboli, E.