Effect of the COVID-19 Pandemic on the Activity of Physicians Working in the Areas of Head and Neck Surgery and Otorhinolaryngology - Kowalski, Luiz Paulo; Imamura, Rui; Castro Junior, Gilberto de Castro; Marta, Gustavo Nader; Chaves, Aline Lauda Freitas; Matos, Leandro Luongo; Bento, Ricardo Ferreira (International archives of otorhinolaryngology, 2020)