| clinical trial | Q30612 |
| P3098 | ClinicalTrials.gov ID | NCT00053469 |
| P17 | country | United States of America | Q30 |
| P921 | main subject | perception | Q160402 |
| P4135 | maximum age | 2 | |
| P1132 | number of participants | 350 | |
| P6153 | research site | National Institutes of Health | Q390551 |
| P859 | sponsor | Eunice Kennedy Shriver National Institute of Child Health and Human Development | Q5409765 |
| P580 | start time | 2003-01-28 | |
| P8363 | study type | observational study | Q818574 |
| P1476 | title | Early Learning and Development Project |
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