Hematologistnoun
A scientist, usually a medical doctor, who specializes in hematology.
Hematologistnoun
a doctor who specializes in diseases of the blood and blood-forming organs
Cardiologistnoun
A physician who specializes in medical problems related to the heart.
Cardiologistnoun
a specialist in cardiology; a specialist in the structure and function and disorders of the heart
Cardiologistnoun
a doctor who specializes in the study or treatment of heart diseases and heart abnormalities