RT Journal Article SR Electronic T1 Glycerol particle cigarettes: a less harmful option for chronic smokers. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 385 OP 387 DO 10.1136/thx.48.4.385 VO 48 IS 4 A1 G Sutherland A1 M A Russell A1 J A Stapleton A1 C Feyerabend YR 1993 UL http://thorax.bmj.com/content/48/4/385.abstract AB In 20 smokers who switched to a new type of virtually tar free cigarette for three days, average nicotine intake was reduced by 44%, carbon monoxide intake increased by 19%, while estimated tar intake was reduced by about 90%. Such cigarettes pose substantially less risk of cancer and chronic obstructive lung disease than conventional cigarettes, and their acceptability and safety could be improved by increasing nicotine yield, reducing carbon monoxide yield, and improving the flavour.