Comment by TheFreim

I had the following items on cigar/pipe smoking bookmarked, I have not read them yet but they may be of interest to you:

https://academic.oup.com/jnci/article/91/8/697/2519397

https://bmcpublichealth.biomedcentral.com/articles/10.1186/s...

https://pubmed.ncbi.nlm.nih.gov/24457405/

https://harmreductionjournal.biomedcentral.com/articles/10.1...