Gürtler, N.; Gysin, C.; Schmid, N.; Pieren, C.; Vischer, M.; Schumacher, S.; Oppermann, P.; Leuba, D.; Veraguth, D. Bilateral Congenital Deafness: What Investigations Should Be Performed? A Qualitative Descriptive Review. Swiss Med Wkly 2017, 147, w14416.