ABSTRACT THE CORRELATION OF BRAIN-DERIVED NEUROTROPHIC FACTOR (BDNF) AND COGNITIVE FUNCTION IN ELDERLY PATIENTS AT THE GERIATRIC OUTPATIENT CLINIC OF RSMH PALEMBANG Devin Fidela, Yuniza, Nur Riviati, Iche A. Liberty Department of Internal Medicine, Faculty of Medicine, Sriwijaya University Dr. Mohammad Hoesin Hospital Palembang Background: Cognitive impairment represents a major public health c…