http://advances.sciencemag.org/content/advances/3/7/e1602821.full.pdf
https://publications.parliament.uk/pa/cm5801/cmselect/cmpubacc/405/405.pdf
https://www.occrp.org/en/loosetobacco/blowing-unsmoke/unsmoking-for-health
https://www.elibrary.imf.org/view/books/082/465808-9781513595603-en/ch002.xml