Dias-Vaz, M., Tiago, C., Morais, A., Ferreira, M. and Carvalho, F. (2020) “Elective Tracheostomy in COVID-19 Patients: A Retrospective Case Series”, Journal of the Portuguese Society of Anesthesiology, 29(2), pp. 72–76. doi: 10.25751/rspa.20118.