S. Pitukweerakul, S. Thavaraputta, S. Prachuapthunyachart, and R. Karnchanasorn, “Hypovitaminosis D is Associated with Psoriasis: A Systematic Review and Meta- Analysis”, kjm, vol. 12, no. 4, pp. 103–108, Nov. 2019, doi: 10.17161/kjm.v12i4.13255.