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*Clinical Chemistry* 2018; 64(9):1338-1346
*BMJ Open* 2018; 8(8):e025031
*Thorax* 2018; 73(10):918-925
*International Archives of Occupational and Environmental Health* 2018; 91(8):937-950
*Gerontology and Geriatric Medicine* 2018; DOI:10.1177/2333721418778623
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*International Journal of Epidemiology* 2019; 48(3):751-766
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