United States Drug Allergy Registry (USDAR) grading scale for immediate drug reactions. The Journal of allergy and clinical immunology 2023 https://researcherprofiles.org/profile/432738786 37652140 Khan DA, Phillips EJ, Accarino JJ, Gonzalez-Estrada A, Otani IM, Ramsey A, Arroyo AC, Banerji A, Chow T, Liu AY, Stone CA, Blumenthal KG
