1. School of Social Sciences, Education and Social Work, Queen’s University Belfast, 6 College Park, Belfast, Northern Ireland
2. School of Nursing and Midwifery, Queen’s University, Medical Biology Centre, 97 Lisburn Road, Belfast, Northern Ireland
3. Cochrane Developmental Psychosocial and Learning Problems Group, Centre for Public Health, Institute of Clinical Sciences, Royal Victoria Hospital, Belfast, Northern Ireland
4. South Eastern Health and Social Care Trust, Ulster Hospital Dundonald, Belfast, Northern Ireland