2) Rob Kardashian: In a 2009 episode of Keeping Up With the Kardashians, Rob got a big surprise when he drank Bruce Jenner's coffee. Turns out the cup had a small dose of Viagra in it. "I woke up from a nap and my penis was hard," Rob said on the show. "It would not go away." The possible differences in health status and lifestyle practices between sildenafil users and nonusers may have confounded our findings. Sildenafil use was correlated with factors that may increase melanoma diagnosis, such as more severe or blistering sunburns and more physical examinations. In contrast, users tended to have less exposure to sunlight in adulthood, which may have decreased melanoma risk. Because melanoma and nonmelanoma skin cancer share major risk factors, we sought to address the concern about residual confounding by examining the association of sildenafil use with nonmelanoma skin cancer. Sildenafil use was associated exclusively with melanoma, indicating that our findings were less likely due to sun exposure, physical examinations, or detection bias. The homogeneity of the cohort decreases the misclassification of work-related sun exposures or health awareness. Erectile function itself was not associated with melanoma either. Together, these results suggest an association between sildenafil use and melanoma, regardless of other characteristics. Even so, from findings in an observational study, we cannot rule out the possibility of residual confounding by unmeasured or imperfectly measured confounders. viagra how does it work latido cardíaco irregular;
The patients in studies had varying degrees of ED. One-third to one-half of the subjects in these studies reported successful intercourse at least once during a 4-week, treatment-free run-in period.
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