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Head and neck cancer (HNC) represents a broad spectrum of diseases that involves the nasal and oropharyngeal cavities, the paranasal sinuses, the major and minor salivary glands, the larynx and the lymphatic tissues of the neck. The world-wide yearly incidence exceeds over half a million cases. Tobacco (smoking and smokeless) and alcohol use are the principal risk factors, however, a substantial and...
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