De Rose, D. U.; Romano, V.; Priolo, F.; Zecca, C.; Maggio, L.; Vento, G.; Gallini, F. An Unusual Pneumoperitoneum in an Extremely Low Birth Weight Preterm Newborn. Acta Biomed 2021, 92 (S1), e2021213. https://doi.org/10.23750/abm.v92iS1.11090.