Voordouw, Jantine, et al. “The Direct and Indirect Costs Associated With Food Hypersensitivity in Households: A Study in the Netherlands, Poland, and Spain”. Applied Studies in Agribusiness and Commerce, vol. 10, no. 2-3, Aug. 2016, pp. 107-1, https://doi.org/10.19041/APSTRACT/2016/2-3/12.