Miscellaneous
https://www.mayoclinic.org/diseases-conditions/copd/symptoms-causes/syc-20353679 https://www.cdc.gov/tobacco/campaign/tips/diseases/copd.html https://www.dovepress.com/health-effects-in-copd-smokers-who-switch-to-electronic-cigarettes-a-r-peer-reviewed-article-COPD?fbclid=IwAR2toNQiFA8zjnXxjVWR-ze-dwMgB4oqiZbRev-JQ2RlN5khjbpTd3CVP9g https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5677304/ https://journals.sagepub.com/doi/full/10.1177/2040622320961617 https://www.rcm.org.uk/ https://www.rcm.org.uk/media/2350/e-cigarettes-in-pregnancy.pdf