148 CLONAL EVOLUTION OF HEMATOPOIETIC STEM CELL UNDER TREATMENT BY LENALIDOMIDE IN NON DEL(5Q) MDS. Issue 1 (April 2015) - Chesnais, V.; Renneville, A.; Toma, A.; Passet, M.; Gauthier, A.; Delaunay, J.; Rose, C.; Stamatoullas, A.; Beyne-Rauzy, O.; Fenaux, P.; Dreyfus, F.; Preudhomme, C.; et al.