Upfront primary tumour resection and survival in synchronous metastatic colorectal cancer according to primary tumour location and RAS status: Pooled analysis of the Spanish Cooperative Group for the Treatment of Digestive Tumours (TTD)

Benavides, Manuel; Gomez-Espana, Auxiliadora; Garcia-Alfonso, Pilar; Garcia Gonzalez, Cristina; Maria Vieitez, Jose; Rivera, Fernando; Jose Safont, Maria; Abad, Albert; Sastre, Javier; Valladares-Ayerbes, Manuel; Carrato, Alfredo; Gonzalez-Flores, Encarnacion; Robles,...