| 25-OH-D | 25-hydroxy vitamin D |
| ASC | age-adjusted standard score |
| CAP | College of American Pathologists |
| LC-MS/MS | liquid chromatography tandem mass spectrometry |
| PTH | parathyroid hormone |
| RCT | randomized control trials |
| SP | school performance |
| SPM | Standard Progressive Matrices |
| VD | vitamin D |
| VDR | vitamin D receptors |
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