Kiehl, R, and G Ionescu. “A Defective Purine Nucleotide Synthesis Pathway in Psoriatic Patients”. Acta Dermato-Venereologica 72, no. 4 (August 1, 1992): 253–255. Accessed July 18, 2026. https://medicaljournalssweden.se/actadv/article/view/16671.