- Measuring health status using the Health Utilities Index: Agreement between raters and between modalities of administration
- Feasibility and reliability of a mailed questionnaire to obtain visual analogue scale valuations for health states defined by the health utilities index mark 3
- Mental health problems in children with intellectual disability: Use of the Strengths and Difficulties Questionnaire
- Food intolerance (food hypersensitivity) and chronic complaints in children: The parents' perception
- Primary care in five European countries: A citizens’ perspective on the quality of care for children