1. Gill P, Stewart K, Treasure E, Chadwick B . Methods of data collection in qualitative research: interviews and focus groups. Br Dent J 2008; 204: 291–295.
2. Blinkhorn A S, Leathar D S, Kay E J . An assessment of the value of quantitative and qualitative data collection techniques. Community Dent Health 1989; 6: 147–151.
3. Watt R . Introduction. In Fuller S S, Watt R (eds) Using qualitative and quantitative research to promote oral health. pp 1–2. Manchester: Eden Bianchi Press, 1992.
4. Mayall B . Conversations with children. In Christensen P, James A (eds) Research with children. pp 120–135. London: Falmer Press, 2000.
5. Instone S L . Development strategies for interviewing children. J Pediatr Health Care 2002; 16: 304–305.