ZHANG, Weihua et al. Identifying High Comorbidity Index in COPD Hospital Re-Admission. Medical Research Archives, [S.l.], v. 6, n. 4, apr. 2018. ISSN 2375-1924. Available at: <https://esmed.org/MRA/mra/article/view/1742>. Date accessed: 22 dec. 2024. doi: https://doi.org/10.18103/mra.v6i4.1742.