Rheumatology / Immunology / Adolescent / DNA / Humans / Systemic Lupus Erythematosus / United States / Female / Male / Clinical Sciences / Aged / Middle Aged / Adult / Public health systems and services research / Time Factors / Prognosis / Age Factors / European Continental Ancestry Group / Systemic Lupus Erythematosus / United States / Female / Male / Clinical Sciences / Aged / Middle Aged / Adult / Public health systems and services research / Time Factors / Prognosis / Age Factors / European Continental Ancestry Group