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We conducted an a priori power analysis using G*Power Software for independent samples Students t-test 22 , assuming the group difference in mean change of the score is 2 (standard deviation 1.3) 7 and aiming to detect a significance level of 1% and statistical power of 90%, a total sample size of 30 participants (15 in each group) was needed

Its important to know that the majority of the illnesses and deaths related to vaping have come from black market productsand theres a reason for that

Essentially both are very similar even in terms of the nicotine satisfaction level of the end-user

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Difficulties in Whitening Smokers Teeth Whitening smokers teeth is tricky