. 2023 Apr 26;43(2 Suppl 1):S111–S122. doi: 10.14639/0392-100X-suppl.1-43-2023-14
Società Italiana di Otorinolaringoiatria e Chirurgia Cervico-Facciale, Rome, Italy
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Figure 1.
The Derkay Staging System 12.