Xiao S, Marshak-Rothstein A, Ju ST. Sp1 is the major fasl gene activator in abnormal CD4(-)CD8(-)B220(+) T cells of lpr and gld mice. Eur J Immunol. 2001 Nov;31(11):3339–48. doi: 10.1002/1521-4141(200111)31:11<3339::aid-immu3339>3.0.co;2-u. PMID: 11745351.