Vallelonga, F., Diella, F. A., Converso, M., De Filippi, G., Bosco, F., Panero, F., Aprà, F. and Elia, F. (2022) “COVID-19 in sub-intensive care unit: An italian single-center experience along the three epidemic waves”, Emergency Care Journal, 18(3). doi: 10.4081/ecj.2022.10648.