Spontaneous Pneumopericardium and Pneumomediastinum in Twelve COVID-19 Patients Jorge Paul Juárez-Lloclla; Franco León-Jiménez; Juan Urquiaga-Calderón; Héctor Temoche-Nizama; Mayte Bryce-Alberti; Arianna Portmann-Baracco; Alfonso Bryce-Moncloa;