Egbert 1993.
| Study characteristics | ||
| Methods | see Egbert 1990 | |
| Participants | see Egbert 1990 | |
| Interventions | see Egbert 1990 | |
| Outcomes | see Egbert 1990, plus anxiety | |
| Source of funding | see Egbert 1990 | |
| Notes | see Egbert 1990 | |
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