@article{khammissa2018,
  title={The Biological Activities of Vitamin D and Its Receptor in Relation to Calcium and Bone Homeostasis, Cancer, Immune and Cardiovascular Systems, Skin Biology, and Oral Health},
  author={R. A. G. Khammissa and Jeanine Fourie and Mojakgomo Hendrick Motswaledi and Raoul Ballyram and J Lemmer and L. Feller},
  year={2018},
  journal={BioMed Research International},
  doi={10.1155/2018/9276380},
  url={https://doi.org/10.1155/2018/9276380}
}