A metabolomic study of biomarkers of meat and fish intake - Cheung, W; Keski-Rahkonen, P; Assi, N; Ferrari, P; Freisling, H; Rinaldi, S; Slimani, N; Zamora-Ros, R; Rundle, M; Frost, G; Gibbons, H; Carr, E; et al. (American Journal of Clinical Nutrition, 2017)