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Further studies are needed to confirm the effects of smoking cessation on endothelial function using an appropriate study design, several smoking cessation methods, short- to long-term follow-up periods, different grades of smoking status, and diverse subjects including subjects with advanced atherosclerosis and healthy subjects in large clinical trials

The first group consists of external threats including infectious diseases, natural disasters, and environmental impact

I feel very much a part of this, because it was I who convinced Air Canada to let us do the clinical studies on cotinine on their airline

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