DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Looker AC, Pfeiffer CM, Lacher DA, Schleicher RL, Picciano MF, Yetley EA.
Serum 25-hydroxyvitamin D status of the US population: 1988–1994 compared with 2000–2004
Am J Clin Nutr 2008; 88: 1519-1527
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