Dias-Vaz, Marta, Catarina Tiago, Ana Morais, Milene Ferreira, and Filipa Carvalho. 2020. “Elective Tracheostomy in COVID-19 Patients: A Retrospective Case Series”. Journal of the Portuguese Society of Anesthesiology 29 (2):72-76. https://doi.org/10.25751/rspa.20118.