Interviews were conducted over a four month period from May to August 2006, either in person or by telephone. The interviews were conducted by two of the research team members (EA and BMcC). To maximise consistency of questioning, a semi-structured interview guide was followed in each of the interviews. The questions were open-ended and interviews lasted between 45 minutes to 1 hour. All interviews were audio-taped and then fully transcribed. The transcriptions were checked for accuracy against the taperecordings and then imported into NVivo 7, a qualitative data management software program commonly used in qualitative research [41] .