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APA Citation
Visser, J., Knight, K., Philips, L., Visser, W., Wallace, M., Nel, D., & Blaauw, R. (2019). determinants of serum 25-hydroxyvitamin D levels in healthy young adults living in the Western Cape, South Africa. South African family practice, 61(4), 150–158. http://access.bl.uk/ark:/81055/vdc_100099946570.0x000021