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It has been shown that cigarette smoke upregulates ACE2 in a dose-dependent manner in lung epithelium, including the goblet, club, Clara cells, and alveolar type 2 (AT2) cells of human and rodent lungs, and quitting smoking decreases ACE2 expression (reversible) [13]

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10.1038/s41586-018-0039-9 [DOI] [PMC free article] [PubMed] [Google Scholar] Stairs D, Dworkin S, 2008

Press the "O" key to take out a cigarette and start smoking

Consider using a vacuum sealer or freezer bags to reduce air exposure and prevent freezer burn when freezing

Qualitative inquiry and research design: Choosing among five approaches