Sex is a strong prognostic factor in stage IV non-small-cell lung cancer patients and should be considered in survival rate estimation

Miguel Barquín, Virginia Calvo, Francisco Garcia‐García, Beatriz Núñez, Estela Sánchez‐Herrero, Roberto Serna‐Blasco, M. Auglytė, Enric Carcereny, Delvys Rodríguez‐Abreu, Rafael López Castro, M. Guirado, Carlos Camps, Joaquim Bosch‐Barrera, Bartomeu Massutí, Ana Laura Ortega Granados, E. del Barco, J.L. González-Larriba, David Aguiar, Rosario García‐Campelo, Manuel Dómine, Sara Agraso, M.A. Sala, Juana Oramás, Reyes Bernabé, Remei Blanco, Consuelo Parejo, Alberto Cruz, Ernestina Menasalvas, Ana Royuela, Atocha Romero, Mariano Provencio