S. Siregar, S. ., A. Romdhoni, and M. Azizah Hakim, “Effect of vitamin D₃ supplementation on Sinonasal Outcome Test-22 (SNOT-22) and visual analogue scale scores in patients with chronic rhinosinusitis”, apic, vol. 30, no. 6, pp. 710-715, Oct. 2026.