PO-055: Subglottic squamous cell carcinoma in Denmark from 1971-2016 –a report from the DAHANCA-group. (March 2017) - Hill-Madsen, L.; Kristensen, C.A.; Andersen, E.; Johansen, J.; Andersen, L.J.; Primdahl, H.; Overgaard, J.; Lyhne, N.M.