[119] US General Accounting Office, Pesticides: Improvements Needed to Ensure the Safety of Farmworkers and Their Children , GAO/RCED-00-40, March 2000, (accessed February 3, 2014)
Self-reported research can also be limited by participants ability to assess themselves accurately, including both personal and cultural biases
Studies have shown depressed people who vape or smoke tend to use nicotine earlier in the day and in higher quantities than non-depressed individuals, which further contributes to their dependence on the drug
Similarly, economic status, education, and place of residence have a significant role in determining the use of SLT
What's legal in one country can result in fines or confiscation in another