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Results 1 - 1 of 1 for Hereditary persistence of fetal hemoglobin
  1. Thalassemia 
    ... protein are missing or there is a variant. Beta thalassemia occurs when similar gene defects affect production of ... type has many different subtypes. Both alpha and beta thalassemia include the following two forms: Thalassemia major Thalassemia ...
    https://medlineplus.gov/ency/article/000587.htm - Medical Encyclopedia