Single-cell sequencing reveals clonal expansions of pro-inflammatory synovial CD8 T cells expressing tissue-homing receptors in psoriatic arthritis ‌ Penkava, F, Del Castillo Velasco-Herrera, M, Young, M, Yager, N, Nwosu, L, Pratt, A, Lledo Lara, A, Guzzo, C, Mamanova, L, Cole, S, Efremova, M, Simone, D, Filer, A, Brown, C, Croxford, A, Isaacs, J, Teichmann, S, Bowness, P, Behjati, S, Al-Mossawi, M