Radiotherapy (RT) versus RT enhanced by cisplatin (DDP) in stage III Non-Small Cell Lung Cancer (NSCLC): Randomized cooperative study: Trovõ MG, Minatel E, Franchin G, Gobitti C, Innocente R, Veronesi A, Crivellari D, Nascimben O, Boccieri MG, Bolzicco G, Mazza F, Pizzi GB, Torretta A, Monfardini S. For the North-Eastern Italian Oncology Group (GOCCNE) - Operation Office C.R.O. - Aviano (PN), Italy