@misc{indiciaeb1dbb85e0b72, title = {Polio and ALS.}, author = {F H Norris and E H Denys and K Sangu}, year = {1990}, doi = {10.1212/wnl.40.7.1150}, url = {https://pubmed.ncbi.nlm.nih.gov/2356023/}, note = {Source identifier: 2356023} }