A systematic review was employed to extract data from relevant studies, estimate pooled RRs comparing SHS exposure risks while adjusting for systematic biases, quantify unexplained between-study heterogeneity, evaluate publication and reporting biases, and estimate the BPRF to generate conservative risk estimates and corresponding risk-outcome scores (ROS)
Psychopharmacology 194:395402 Hatsukami DK, Kotlyar M, Hertsgaard LA, Zhang Y, Carmella SG, Jensen JA, Allen SS, Shields PG, Murphy SE, Stepanov I, Hecht SS (2010a) Reduced nicotine content cigarettes: effects on toxicant exposure, dependence and cessation
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Hydration can ease throat irritation and reduce swallowing reflexes that sometimes lead to more hiccups