Anaesthesia care with and without tracheal intubation during emergency endoscopy for peptic ulcer bleeding: a population-based cohort study. - Lohse, N.; Lundstrøm, L. H.; Vestergaard, T. R.; Risom, M.; Rosenstock, S. J.; Foss, N. B.; Møller, M. H. (BJA: The British Journal of Anaesthesia, 2015)