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pour la consommation du lait de consommation frais, on suppose que l'apport entier pour tous les groupes d'âge est contaminé au cours de la durée de la période d'évaluation (c.-à-d., ƒ = 1).
for the consumption of fresh liquid milk, it is assumed that the entire intake by all age groups is contaminated over the duration of the assessment period (i.e., f =1).