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White spots with sharply defined borders from the normal tissue Red spots with sharply defined borders from the normal tissue Ulcers (open sores) that do not heal in 2 weeks Lumps or bumps growing out of the tissue Pre-Cancers: Cancers: Highest risk areas (places where most oral cancers develop): Sides and under surface of tongue Floor of mouth (part of the mouth under your tongue where the tongue rests) Soft palate and back of throat What Causes Oral Pre-Cancer and Cancer

Smoking abstinence Six-month smoking abstinence rates were determined from the before-and-after evaluations conducted by HHNs Centre of Excellence for Clinical Smoking Cessation

What are the key differences between these two views

The prevalence of e-cigarette use tripled from 2013 to 2014 most likely due to reductions in cost and improvements in product usability