Burlando, Martina, Emanuele Cozzani, Caterina Campisi, Antonio Di Costanzo, and Aurora Parodi. 2016. “Different Responses to Ustekinumab of Two HLA-Cw6-Positive Homozygous Twins With Psoriasis”. Acta Dermato-Venereologica 96 (6):858-59. https://doi.org/10.2340/00015555-2333.