Pediatric adenoidectomy: a population-based regional study on epidemiology and outcome - Thomas, K; Boeger, D; Buentzel, J; Esser, D; Hoffmann, K; Jecker, P; Mueller, A; Radtke, G; Geissler, K; Finkensieper, M; Guntinas-Lichius, O (Int J Ped Otorhinolaryngol, 2013)