D. Quispe-Aranda, S. Arce-Silva, I. Neyra-Vera, and J. L. Maguiña, “Cytochemical findings in pleural fluid from patients with COVID-19, cared for in an emergency department”, Rev. Cuerpo Med. HNAAA, vol. 14, no. 3, pp. 267–271, Dec. 2021.