@misc{indiciae87d2628df054, title = {Epidemiologic contributions to multiple sclerosis: an overview.}, author = {J F Kurtzke}, year = {1980}, doi = {10.1212/wnl.30.7\_part\_2.61}, url = {https://pubmed.ncbi.nlm.nih.gov/6993993/}, note = {Source identifier: 6993993} }