Rahayu R, Masfiyah M, Intisari D, Putri IH, Hibatullah MA. Validation of sputum gram stain and culture for diagnosis of pneumonia in critically iii patient: a retrospective observational study. Sains Med J Ked Kes. 2023;14(2):44-51. doi:10.30659/sainsmed.v14i2.32809