Plasma carotenoids as biomarkers of intake of fruits and vegetables: ecological-level correlations in the European Prospective Investigation into Cancer and Nutrition (EPIC).

Al-Delaimy, W.K.; Slimani, N.; Ferrari, P.; Key, T.J.; Spencer, E.; Johansson, I.; Johansson, G.; Mattisson, I.; Wirfalt, E.; Sieri, S.; Agudo, A.; Celentano, E.; Palli, D.; Sacerdote, C.; Tumino, R.; Dorronsoro, M.; Ocke, M.C.; Bueno de Mesquita, H.B.; Overvad, K.; Chirlaque, M.D.; Trichopoulou, A.; Naska, A.; Tjonneland, A.; Olsen, A.; Lund, E.; Skeie, G.; Ardanaz, E.; Kesse, E.; Boutron-Ruault, M.C.; Clavel-Chapelon, F.; Bingham, S; Welch, A.A.; Martinez-Garcia, C.; Nagel, G.; Linseisen, J.; Quiros, J.R.; Peeters, P.H.M.; van Gils, C.H.; Boeing, H.H.; Kappel, A.L.; Steghens, J.P.; Riboli, E.