TY - JOUR T1 - Preaface to the series: How can we do it JO - Pulmonology T2 - AU - Nava,Stefano SN - 25310437 M3 - 10.1016/j.pulmoe.2021.01.002 DO - 10.1016/j.pulmoe.2021.01.002 UR - https://journalpulmonology.org/en-preaface-series-how-can-we-articulo-S253104372100009X ER -