“Correlation of QSOFA and NLR to Procalcitonin Levels for Predicting Outcome of Pneumonia Sepsis Patients at RSUP Dr. M. Djamil Padang”. Jurnal Respirologi Indonesia, vol. 40, no. 3, July 2020, pp. 173-81, http://jurnalrespirologi.org/index.php/jri/article/view/122.