FOUR NEW VARIANTS OF THE α2-GLOBIN GENE WITHOUT CLINICAL OR HEMATOLOGIC EFFECTS: Hb PARK RIDGE [α9(A7)Asn→Lys (α2)], Hb NORTON [α72(EF1)His→Asp (α2)], HbLOMBARD [α103(G10)His→Tyr (α2)], AND Hb SAN ANTONIO [α113(GH2)Leu→Arg (α2)]

James D. Hoyer Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 First Street, Rochester, MN, 55905, U.S.A.

Daniel J. McCormick Department of Biochemistry and Molecular Biology, Mayo Clinic, 200 First Street, Rochester, MN, 55905, U.S.A.

Karen Snow Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 First Street, Rochester, MN, 55905, U.S.A.

Jong H. Kwon Lutheran General Children's Hospital, Park Ridge, IL, 60068, U.S.A.

David Booth Norton Family Practice Clinic, Muskegon Heights, MI, 49444, U.S.A.

Manuel Duarte National University of Health Science, Lombard, IL, 60148, U.S.A.

Guy Grayson Pediatric Hematology and Oncology Associates of South Texas, San Antonio, TX, 78229, U.S.A.

Kathleen S. Kubik Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 First Street, Rochester, MN, 55905, U.S.A.

Michael W. Holmes Department of Biochemistry and Molecular Biology, Mayo Clinic, 200 First Street, Rochester, MN, 55905, U.S.A.

Virgil F. Fairbanks Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 First Street, Rochester, MN, 55905, U.S.A.

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