Diversity of treatment of T2N0 glottic cancer of the larynx: lessons to learn from epidemiological cancer registry data - Pantel, M; Wittekindt, C; Altendorf-Hofmann, A; Boeger, D; Buentzel, J; Esser, D; Mueller, A; Wendt, T G; Guntinas-Lichius, O (Acta Otolaryngol, 2011)