The I 2 statistic was calculated to quantify the heterogeneity of the results between studies
Rigotti notes, however, that since participants chose whether to use e-cigarettes on their own, it could be that those who did so were already having more difficulty quitting
[83] Wray agreed to resign in December
Oakeshott P, Hay P, Hay S, Steinke F, Rink E, Kerry S: Association between bacterial vaginosis or chlamydial infection and miscarriage before 16 weeks' gestation: prospective community based cohort study
Officials also want to stop shops from taking cigarette coupons and honoring discounts, and are proposing a minimum price for cigarettes, below what the going rate is in much of the city now, to discourage black market sales