Results Model validation and performance The concordance correlation for the selected model for male total cigarette smoking prevalence was 0.78, 0.83, and 0.87 at sample sizes 10, 50, and 100, respectively, compared to 0.90 when all data were included (i.e., in sample)
Its also a carcinogen
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It remains unclear whether regular cell phone use (where the cell phone is held up to ones ear) can significantly impact sperm quality, since the radiation generated by these devices generally travels only a short distance