http://www.nps.org.au/publications/health-professional/health-news-evidence/2015/nicotine-metabolite-ratio-blood-test
This will make some of the initial guessing obsolete…..leave your thoughts
http://www.nps.org.au/publications/health-professional/health-news-evidence/2015/nicotine-metabolite-ratio-blood-test
This will make some of the initial guessing obsolete…..leave your thoughts