B. Tantikun, S. Jongwiriyanurak, and K. Jitaroon, “Correlation between Serum Vitamin D Levels and Allergic Rhinitis Severity at Vajira Hospital: A Cross-Sectional Study: Correlation between Serum Vitamin D Levels and Allergic Rhinitis Severity”, Vajira Med J, vol. 68, no. 4, p. e269836, Sep. 2024.