Predictive and prognostic factors for treatment and survival in 305 patients with advanced gastrointestinal neuroendocrine carcinoma (WHO G3): The NORDIC NEC study

H Sorbye, S Welin, S W Langer, L W Vestermark, N Holt, P Osterlund, S Dueland, E Hofsli, M G Guren, K Ohrling, E Birkemeyer, E Thiis-Evensen, Matteo Biagini, H Gronbaek, L M Soveri, I H Olsen, B Federspiel, J Assmus, E T Janson, U Knigge