Validity and reliability of a new food frequency questionnaire compared to 24 h recalls and biochemical measurements: pilot phase of Golestan cohort study of esophageal cancer von Malekshah, A.F, Kimiagar, M, Saadatian-Elahi, M, Pourshams, A, Nouraie, M, Goglani, G, Hoshiarrad, A, Sadatsafavi, M, Golestan, B, Yoonesi, A

Volltext