A 68 year old male complains of breathlessness. He has had an aortic valve
replacement 5 years prior to presentation and is on long term warfarin.
Hb 10.2 g/dL
MCV 68 fl
Platelets 375x 109/l
WBC 6.4 x109/l
reported as normal.
Which of the following would you request next?
Bone marrow examination