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In contrast to hydroa vacciniforme, these lesions can occur on sun-protected sites

Parents are encouraged by healthcare professionals, school authorities, and public health officials to include the topic of chewing tobacco use when they discuss the hazards of tobacco use with their children, especially teenage children

Tests for cotinine can be either qualitative (a simple positive/negative result) or quantitative (measuring the exact concentration)

The studies have directly examined malignant tissue by swab or biopsy and demonstrated that the carcinogenic sites are enriched for Gram-negative Fusobacteria and Bacteroidetes, showing lower abundance of Streptococcus and Rothia spp