Hypovitaminosis D in a sunny country.

@article{Fuleihan1999HypovitaminosisDI,
  title={Hypovitaminosis D in a sunny country.},
  author={Ghada El-Hajj Fuleihan and Mary E. Deeb},
  journal={The New England journal of medicine},
  year={1999},
  volume={340 23},
  pages={1840-1}
}