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    "sources/abraheem2022-tea-coffee-lead-cadmium",
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    "sources/albals2021-coffee-jordan-icpms",
    "sources/berego2023-sidama-coffee-metals",
    "sources/biondicfuckar2023-coffee-silverskin-metals",
    "sources/dasilva2017-heavy-metals-coffee-brazil",
    "sources/demir2025-coffee-elements-turkiye",
    "sources/domagalska2025-instant-coffee-heavy-metals",
    "sources/efsa2015-nickel-food-water",
    "sources/guadalupe2023-peruvian-coffee-metals",
    "sources/kowalska2021-metals-herbs-spices-tea-coffee-poland",
    "sources/noor2023-merapi-robusta-coffee-metals",
    "sources/pokorskaniewiada2024-polish-coffee-trace-elements",
    "sources/salaheldin2025-multimatrix-foods-egypt",
    "sources/stahl2017-aluminum-food-contact-part1",
    "sources/winiarska-mieczan2022-cd-pb-instant-coffee-poland",
    "sources/zergui2023-coffee-metals-origin-icp-ms"
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