@misc{indiciae17ead23334b3, title = {Primary optic neuritis evolved in multiple sclerosis: an epidemiological study.}, author = {S Congia and G A Mellino and A Porcella and G Borghero and A Cannas}, year = {1993}, url = {https://pubmed.ncbi.nlm.nih.gov/8160555/}, note = {Source identifier: 8160555} }