"Hemoglobin Variants". Lab Tests Online. American Association for Clinical Chemistry. 2007-11-10. Archived from the original on 2008-09-20. Retrieved 2008-10-12.
"Hemoglobin Variants". Lab Tests Online. American Association for Clinical Chemistry. 2007-11-10. Archived from the original on 2008-09-20. Retrieved 2008-10-12.