van der Voort, Ella A.M, et al. “Increased Prevalence of Advanced Liver Fibrosis in Patients With Psoriasis: A Cross-Sectional Analysis from the Rotterdam Study”. Acta Dermato-Venereologica, vol. 96, no. 2, Aug. 2015, pp. 213-7, doi:10.2340/00015555-2161.