| web | https://parkinsonsnewstoday.com/2020/03/27/possible-link-between-vitamin-b12-and-dementia-in-parkinsons-disease/ |
| author | Marisa Wexler |
| publication | Parkinson's News Today |
| date | 2020-03-27 |
| web | McCarter SJ, Stang C | Parkinsonism Relat Disord | 2020-03-16 |
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