Siti Hasna Ulfiah, and Yuly Peristiowati. “The Analysis of Oxygen Saturation Value D-Dimer Levels and the Neutrophil-Lymphocyte Ratio Toward the Death of Covid-19 Patients With Comorbid at Gambiran Hospital, Kediri”. Journal for Quality in Public Health, vol. 6, no. 1, Nov. 2022, pp. 257-64, doi:10.30994/jqph.v6i1.421.