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MMW - Fortschritte der Medizin > 2017 > 159 > 15 > 41-43
International Journal of Pediatric Otorhinolaryngology > 2017 > 96 > C > 111-115
Acta Otorrinolaringologica (English Edition) > 2016 > 67 > 2 > 93-101
International Journal of Pediatric Otorhinolaryngology > 2013 > 77 > 10 > 1683-1688