Results of the Spanish National Polytrauma Registry. Where are we and where are we heading? Andrea Campos-Serra; Lola Pérez-Díaz; Cristina Rey-Valcárcel; Sandra Montmany-Vioque; Manuel Artiles-Armas; Daniel Aparicio-Sánchez; Luís Tallón-Aguilar; Marta Gutiérrez-Andreu; Julia Bernal-Tirapo; Francisca Garcia-Moreno Nisa; Cristina Vera-Mansilla; Ricardo González-Conde; Leticia Gómez-Viana; Alberto Titos-García; Jose Aranda-Narvaez;