Cai, Xing-Dong, et al. “Logistic Regression Analysis of Clinical and Computed Tomography Features of Pulmonary Abscesses and Risk Factors for Pulmonary Abscess-Related Empyema”.
Clinics, vol. 74, May 2019, p. e700,
https://doi.org/10.6061/clinics/2019/e700.