Fieldwork took place in two main stages. The first stage took place in April 2004 in Phnom Penh where 400 interviews were conducted and the second stage in July and August 2004 in the five provinces and involved 800 interviews. In addition, because of problems encountered during the initial fieldwork in Phnom Penh, supplemental interviewing was undertaken in June, August and September. This resulted in an additional 73 interviews, making the total Phnom Penh sample size 473. 2 A detailed description of response rates is provided in Appendix C. Refusal rates were in Phnom compared to.