Prognostic value of the neutrophil-to-lymphocyte ratio for predicting hospital length of stay in pneumonia patients: A cross-sectional study - Henny Syapitri; Johansen Hutajulu; Amila Amila; Lasma Rina Efrina Sinurat; Janno Sinaga; Ivan Elisabeth Purba (Nursing and Health Sciences Journal (NHSJ), 2026)