Fellows each year alternate on weekly basis in two core rotations: 1. The bone marrow/flow cytometry rotation include interpretation of blood smears, body fluids, bone marrow aspirate and biopsy, and also includes interpretation of flow cytometry. 2. The lymph node/consults rotation which handle primary cases and consults. Highly specialized and dedicated rotations in flow cytometry, special coagulation, cytogenetics and molecular genetics. Participation in related research, writing 1 + papers.