Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Pernicious Anemia ?
    ### Response:
    Your doctor will diagnose pernicious anemia based on your medical and family histories, a physical exam, and test results.
                
Your doctor will want to find out whether the condition is due to a lack of intrinsic factor or another cause. He or she also will want to find out the severity of the condition, so it can be properly treated.
    