Btk levels set the threshold for B-cell activation and negative selection of autoreactive B cells in mice. - Kil LP; de Bruijn MJ; van Nimwegen M; Corneth OB; van Hamburg JP; Dingjan GM; Thaiss F; Rimmelzwaan GF; Elewaut D; Delsing D; van Loo PF; Hendriks RW (Blood, 2012)