They carried out this process until the devices stopped working
THC can stay in your urine for 1-30 days for infrequent users and 1-3 days in your blood and saliva
15 Opening a window, sitting in a separate area, or using ventilation, air conditioning, or a fan cannot eliminate secondhand smoke exposure
As a systematic review by the Cochrane Library noted: The small number of trials, low event rates and wide confidence intervals around the estimates mean that our confidence in the result is rated low. For example, there were weaknesses in the randomized trials
A full description of the ITC4 methodology, sample profile, and survey rates, including comparisons with national benchmarks, is available at Measures The ITC4 Survey was standardised across the four countries: respondents in each country were asked the same questions, with only minor variations for colloquial speech