American Society of Hematology: https://www.hematology.org/education/patients/anemia/sickle-cell-disease
National Heart, Lung, and Blood Institute: https://www.nhlbi.nih.gov/health/sickle-cell-disease
The Centers for Disease Control and Prevention: https://www.cdc.gov/sickle-cell/complications/index.html
Sickle Cell Disease Association of America: https://www.sicklecelldisease.org/
