Oncogene 32:13841395 Mondal S, Adhikari N, Banerjee S, Amin SA, Jha T (2020) Matrix metalloproteinase-9 (MMP-9) and its inhibitors in cancer: a minireview
Many also include a printed circuit board containing copper, tin, and other metals
I say that without any sense of pride at all
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Exposure of human epithelial cells at the airliquid interface to aerosols from an e-cigarette device resulted in dose-dependent cell death
So I think the chemical additives, the more I look, the more interesting they become