Nakaminato, S. (2012) “Prevalence of esophageal cancer during the pretreatment of hypopharyngeal cancer patients: Routinely performed esophagogastroduodenoscopy and FDG-PET/CT findings”, Acta Oncologica, 51(5), pp. 645–652. doi: 10.3109/0284186X.2011.652260.