De Pità, O., et al. “Squamous Cell Carcinoma-Related Antigen (SCCr-Ag), SICAM-1 and ?2-Microglobulin Are Useful Markers of Disease Activity in Psoriasis”. Acta Dermato-Venereologica, vol. 79, no. 2, Mar. 1999, pp. 132-5, doi:10.1080/000155599750011354.