title: Polycyclic aromatic hydrocarbon exposure in oesophageal tissue and risk of oesophageal squamous cell carcinoma in north-eastern Iran.
authors.affiliation: Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge, UK. bruce.ponder@cancer.org.uk
authors.forename: Bruce
authors.initials: B
authors.lastname: Ponder