International Archives of Otorhinolaryngology, 24 Jun 2015 https://www.thieme-connect.com/products/ejournals/html/10.7162/S1809-97772012000200011
International Archives of Otorhinolaryngology, 23 Jun 2015 https://www.thieme-connect.com/products/ejournals/html/10.7162/S1809-97772012000200011