Attinà, D., F. Ciccarese, M. Mughetti, A. Rocca, P. Contini, and M. Zompatori. “When the Chest Is Clueless, Look Downstairs”. Monaldi Archives for Chest Disease 79, no. 1 (November 26, 2015). Accessed October 16, 2019. https://monaldi-archives.org/index.php/macd/article/view/110.