Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Federico Tacconi and Paola Rogliani and Francesca Leonardis and Loredana Sarmati and Eleonora Fabbi and Gerardo De Carolis and Eleonora La Rocca and Gianluca Vanni and Vincenzo Ambrogi,Incidence of pneumomediastinum in COVID-19: A single-center comparison between 1st and 2nd wave,Respiratory Investigation,2212-5345,Elsevier BV,2021-09,59,5,661-665,https://cir.nii.ac.jp/crid/1361699995660649344,https://doi.org/10.1016/j.resinv.2021.04.010