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But the only guaranteed way to prove someone smoked in your unit is by using a specialized cigarette smoke detector like the Minut sensor

The network meta-analysis results further indicated that smoking bans, anti-tobacco campaigns and tax increases effectively reduced smoking prevalence

Wash, Wash, Wash (And Then Wash Some More) Anything washable needs to go into the washing machine

If they were eligible, they were given more detailed information about the study including what participation would involve, the types of information collection, how the information would be used, time taken, confidentiality, voluntary nature of participation and anonymity of their responses