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APA Citation
Durazo-Arvizu, R. A., Dawson-Hughes, B., Kramer, H., Cao, G., Merkel, J., Coates, P. M., & Sempos, C. T. (2017). the Reverse J-Shaped Association Between Serum Total 25-Hydroxyvitamin D Concentration and All-Cause Mortality: The Impact of Assay Standardization. American journal of epidemiology, 185(8), 720–726. http://access.bl.uk/ark:/81055/vdc_100126060671.0x000064