Trotter, J L Elevated serum interleukin-2 levels in chronic progressive multiple sclerosis. [electronic resource] - The New England journal of medicine May 1988 - 1206 p. digital Publication Type: Letter ISSN: 0028-4793 Standard No.: 10.1056/nejm198805053181816 doi Subjects--Topical Terms: Chronic DiseaseHumansInterleukin-2--analysisMultiple Sclerosis--immunology