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Method of initial approach to families, by region |
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| Region |
Method of approach |
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| North England |
Indirect |
Telephone |
Child's paediatrician phoned; followed by phone call from researcher |
| West Sweden |
Direct |
Letter – opt-out |
Researcher sent opt-out letter, followed by phone call |
| Northern Ireland |
Indirect |
Letter – opt-in |
Child's primary notifier to the register sent opt-in letter, follow-up letters and in some cases telephoned some families |
| South East France |
Direct |
Letter – opt-out |
Researcher sent opt-out letter, followed by phone call |
| South West Ireland |
Direct |
Telephone |
Researcher phoned, followed by letter |
| East Denmark |
Direct |
Letter – opt-out |
Researcher sent opt-out letter, followed by phone call |
| Central Italy |
Indirect |
Telephone |
Doctor, social worker or therapist phoned family, followed by phone call by researcher |
| South West France |
Direct |
Telephone |
Researcher phoned, followed by letter |
| North West Germany |
Indirect |
Face-to-face |
Child's primary carer approached family face-to-face |
Dickinson et al. BMC Public Health 2006 6:273 doi:10.1186/1471-2458-6-273 |
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