Ciocan, C. et al. 2020. Impact of wearing a surgical mask on respiratory function in view of a widespread use during COVID-19 outbreak. A case-series study: Respiratory Protective Devices fitness for use. La Medicina del Lavoro | Work, Environment and Health. 111, 5 (Oct. 2020), 354–364. DOI:https://doi.org/10.23749/mdl.v111i5.9766.