Cilengitide and cetuximab in combination with platinum-based chemotherapy as first-line treatment for subjects with advanced NSCLC. Open-label, randomized, controlled, multicenter Phase II study investigating 2 cilengitide regimens in combination with cetuximab and platinum-based chemotherapy (cisplatin/vinorelbine or cisplatin/gemcitabine) compared to cetuximab and platinum-based chemotherapy alone as first-line treatment for patients with advanced NSCLC (CERTO)