Figure 1From: Alcohol consumption, cigarette smoking and the risk of subtypes of head-neck cancer: results from the Netherlands Cohort Study Flow diagram of the number of subcohort members and cases on whom the analyses were based. *PALGA: nationwide network and registry of histopathology and cytopathology in the Netherlands. aOral cavity cancer; oro-/hypopharyngeal cancer; oral cavity, pharynx unspecified or overlapping cancer; laryngeal cancer.Back to article page