Excess deaths among adults with sickle cell disease in 2020 compared to prior years.

"Declarations Ethics approvalAll procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Consent to participateWaiver of informed consent was granted by the institutional IRB as all data obtained was retrospective and all identifying information was removed. Conflict of interestDr. Susanna Curtis declares participating in consultancy boards with Global Blood Therapeutics and Novartis. Dr. Caterina Minniti declares consultancy with Global Blood Therapeutics, Novartis, Forma, Novo Nordisk, Chiesi, F. Hoffmann-La-Roche, Bluebird Bio, CSL Behring. Conflict of interest Dr. Susanna Curtis declares participating in consultancy boards with Global Blood Therapeutics and Novartis. Dr. Caterina Minniti declares consultancy with Global Blood Therapeutics, Novartis, Forma, Novo Nordisk, Chiesi, F. Hoffmann-La-Roche, Bluebird Bio, CSL Behring."

"Funding Susanna Curtis is supported by a K23 from the NHLBI: 1 K23 HL151884-01A1."