Zar, Vershima Daniel, Best Ordinioha, Daniel Mairafi Gimbason, and Wamanyi Yohanna. 2025. “EVALUATING THE WHO PEN INITIATIVE: A SYSTEMATIC REVIEW OF ITS INFLUENCE ON NON-COMMUNICABLE DISEASE AWARENESS AND PREVENTION AMONG PRIMARY HEALTHCARE WORKERS IN NIGERIA”. American Journal of Public Health and Epidemiology (AJPHE) 11 (3):15-32. https://doi.org/10.5281/zenodo.15690030.