title: STUDIES ON THE NATURAL HISTORY OF MULTIPLE SCLEROSIS. I. OBJECTIVES, DESIGNS, AND METHODS.
mesh_terms: D001699:Biometry; D006801:Humans; D009103:Multiple Sclerosis; D009902:Optic Neuritis; D011379:Prognosis; D013223:Statistics as Topic
keywords: MULTIPLE SCLEROSIS; OPTIC NEURITIS; PROGNOSIS; STATISTICS