2Thorne-Lyman A, Fawzi WW. Vitamin D during pregnancy and maternal, neonatal and infant health outcomes: a systematic review and meta-analysis[J]. Paediatr Perinat Epidemiol, 2012, 26 Suppl 1:75-90.DOI: 10.1111/j.1365-3016.2012.01283.x.
3Holick MF. Vitamin D deficiency[J]. N Engl J Med, 2007, 357(3):266-281.DOI: 10.1056/NEJMra070553.
4Burris HH, Van Marter L J, McElrath TF, et al. Vitamin D status among preterm and full-term infants at birth[J]. Pediatr Res, 2014, 75(1-1):75-80.DOI:10.1038/pr.2013.174.
5Monangi N, Slaughter JL, Dawodu A, et al. Vitamin D status of early preterm infants and the effects of vitamin D intake during hospital stay[J]. Arch Dis Child Fetal Neonatal Ed, 2014, 99(2):F166-168.DOI: 10.1136/archdischild-2013-303999.
