Future lines of research on pain care, sedation, restraints and delirium in the critically ill patient G. Via-Clavero; M.J. Frade-Mera; D. Alonso-Crespo; A. Castanera-Duro; D. Gil-Castillejos; O. Vallés-Fructuoso; J.J. Rodríguez-Mondéjar; C. López-López; G. Robleda; M. Acevedo-Nuevo;