@article{JuliánAlmárcegui:57094,
      author        = "Julián Almárcegui, Cristina and Lentjes, M. A. H. and
                       Huybrechts, I. and Luben, R. and Wareham, N. and Moreno
                       Aznar, Luis Alberto and Khaw, K. -T",
      title         = "{Fracture risk in relation to serum 25-hydroxyvitamin D
                       and physical activity: Results from the epic-norfolk cohort
                       study}",
      year          = "2016",
}