4Bertl R, Frisch B, et al. Potential of bone marrow biopsy in chronic myeloproliferative disorders[J]. Eur J Haemtol, 1993,50:40.
5Barle R, et al. Moropholigic classification of the myelodysplastic syndromes(MDS): Combined utilization of bone marrow aaspirates and trephine biopsies[J]. Leukemia Research, 1992,16(1): 15.