title: Measuring disease activity in systemic lupus: progress and problems.
authors.forename: Joan T
authors.initials: JT
authors.lastname: Merrill
mesh_terms: D018450:Disease Progression; D006305:Health Status Indicators; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000175:diagnosis* / Q000628:therapy*; D015337:Multicenter Studies as Topic / Q000592:standards*; D011795:Surveys and Questionnaires / Q000592:standards*