Pellizzari, L., C. Ferronato, A. Variola, M. Setti, and V. Di Francesco. “McConnel Sign, a Simple Highly Specific Sign for Identification of a Frequent, under Diagnosed Association: Pulmonary Embolism and Syncope”. Geriatric Care, vol. 7, no. 3, Feb. 2022, doi:10.4081/gc.2021.10280.