ATM and ataxia telangiectasia: ATMdexa1 and further new ATM variants originating from canonical (exons 3-52, 4-53 and 2-52) and non-canonical (short direct repeat: 3-52 and 4-51) splicing were also found in the blood of AT patients undergoing glucocorticoids treatment through autologous erythrocytes in a phase II clinical trial [19, 20].