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Second primary tumors (SPTs) are a significant problem in treating oral and oropharyngeal squamous cell carcinoma and have a negative impact on survival. In most studies the definition of SPT is(More)
BACKGROUND The objective of this study was to define different prognostic groups with regard to locoregional control (LRC) derived from recursive partitioning analysis (RPA). METHODS Eight hundred(More)
An international group of epidemiologists, clinicians and pathologists with a special interest in oral white lesions and their precancerous significance has reviewed earlier work on this topic and(More)