Search strategy used in MEDLINE to identify women, infants and children (WIC) studies
| # | Search terms | Results |
| 1 | WIC.tw. | 1008 |
| 2 | (nutrition or food or voucher or ‘nutrition program’).tw. | 377 002 |
| 3 | 1 and 2 | 599 |
| 4 | (Special* adj4 Supplement* adj4 Nutrit* adj4 Program* adj4 Women* adj4 Infant* adj4 Child*).tw. | 415 |
| 5 | 3 or 4 | 688 |