Rafiq, S. “Frequency and Determinants of Ultra-Processed Foods in the Lunchboxes of Under-12 Students in Urban Pakistan: A Cross-Sectional Survey: Determinants of Ultra-Processed Foods in the Lunchboxes of Under-12 Students”. Pakistan BioMedical Journal, vol. 9, no. 5, May 2026, pp. 29-32, doi:10.54393/pbmj.v9i5.1392.