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The HUman MicroNucleus project on eXfoLiated buccal cells (HUMN XL): the role of life-style, host factors, occupational exposures, health status, and assay protocol

Concentrations of urine cotinine and hydroxycotinine among US children, adolescents, and adults: data from NHANES 20132014
2B, Additional file 1: Fig

It added, however, that the proportion of vapers was highest among current cigarette smokers at 25.3%, and former cigarette smokers at 15%
Use an Exhaust Fan Install a Powerful Exhaust Fan: One of the best ways to keep the air fresh is by using an exhaust fan that can remove smoke from the room