Department of Medicine, Division of Clinical Immunology and Rheumatology, the University of Alabama at Birmingham, Birmingham, AL, USA.

Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, USA.

Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, USA.

Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, USA.

Department of Medicine, Division of Clinical Immunology and Rheumatology, the University of Alabama at Birmingham, Birmingham, AL, USA.

Department of Medicine, Division of Clinical Immunology and Rheumatology, the University of Alabama at Birmingham, Birmingham, AL, USA.

Department of Medicine, Division of Clinical Immunology and Rheumatology, the University of Alabama at Birmingham, Birmingham, AL, USA.

Department of Medicine, Division of Clinical Immunology and Rheumatology, the University of Alabama at Birmingham, Birmingham, AL, USA.

Department of Medicine, Division of Clinical Immunology and Rheumatology, the University of Alabama at Birmingham, Birmingham, AL, USA.

Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, TN, USA.

Department of Medicine, Division of Clinical Immunology and Rheumatology, the University of Alabama at Birmingham, Birmingham, AL, USA; Medicine Service, Birmingham Veterans Affairs Health Care System, Birmingham, AL, USA.

Department of Medicine, Division of Clinical Immunology and Rheumatology, the University of Alabama at Birmingham, Birmingham, AL, USA. Electronic address: hhsu@uabmc.edu.