Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Thalassemias ?
    ### Response:
    Doctors diagnose thalassemias using blood tests, including a complete blood count (CBC) and special hemoglobin tests.
                
A CBC measures the amount of hemoglobin and the different kinds of blood cells, such as red blood cells, in a sample of blood.
    