Reichrath, J, A Perez, SM Müller, TC Chen, A Kerber, FA Bahmer, and MF. Holick. 1997. “Topical Calcitriol (1,25-Dihydroxyvitamin D3) Treatment of Psoriasis: An Immunohistological Evaluation”. Acta Dermato-Venereologica 77 (4):268-72. https://doi.org/10.2340/0001555577268272.