| http://www.w3.org/ns/prov#value | - However, it should be noted that previous adherence to monthly transfusions was a SWiTCH eligibility criterion, so only subjects who were known to be compliant with chronic transfusion therapy were enrolled.Pain is the most common morbidity associated with sickle cell disease, and its frequency and severity vary with the sickle cell genotype and within individuals of the same genotype [16].
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