@article{Martínez-Domínguez:149840,
      author        = "Martínez-Domínguez, S.J. and Tajada, M. and Chedraui, P.
                       and Pérez-López, F.R.",
      title         = "{Systematic review and meta-analysis of Spanish studies
                       regarding the association between maternal
                       25-hydroxyvitamin D levels and perinatal outcomes}",
      year          = "2018",
}