Reference

National Institute on Drug Abuse
http://www.nida.nih.gov/NIDAHome1.html

National Heart, Lung and Blood Association
http://www.nhlbi.nih.gov/index.htm

National Cancer Institute
http://www.nci.nih.gov/

Action on Smoking and Health
http://ash.org/

drkoop.com: Tackling Tobacco
http://www.drkoop.com/wellness/tobacco/

Oxford Brookes Medical Centre: Advice on Smoking
http://www.brookes.ac.uk/student/services/health/smoking.html

Get Character From : Boombo
http://www.boombo.com/

Whelan, Elizabeth M. Cigarettes : What the Warning Label Doesn't Tell You : The First Comprehensive Guide to the Health Consequences of Smoking: Prometheus Books, 1997

Adlkofer, Franz. Effects of Nicotine on Biological Systems (Advances in Pharmacological Sciences): Springer Verlag, 1991