SLAMF1 and B-cell chronic lymphocytic leukemia: It positively correlates with the expression of CD180 in CLL, and around 59% of cases express both CD150 and CD180 (Gordiienko et al. 2017a), consistent with independent studies (Porakishvili et al. 2005, 2011; Bologna et al. 2016) and our own unpublished observations.