%0 Journal Article %A Christopher P L H Chen %A Vincent C T Mok %T Marriage and risk of dementia: systematic review and meta-analysis of observational studies %D 2017 %R 10.1136/jnnp-2017-317178 %J Journal of Neurology, Neurosurgery & Psychiatry %P jnnp-2017-317178 %U https://jnnp.bmj.com/content/jnnp/early/2017/10/30/jnnp-2017-317178.full.pdf