Fig. 3From: Biomarkers of food intake for Allium vegetablesOverview of the validation process and its application for candidate BFIs for Allium vegetables. Colored circles refer to the answer “yes, the criterion is fulfilled for at least some use of the biomarker,” black circles refer to the answer “the criterion has been investigated but it was not fulfilled,” and gray circles refer to the answer “the criterion has not been investigated or data is not available”Back to article page