| Questionnaire Return Rate responses | Frequency | Percentage | |
| Group 1—Three cohorts. First stage survey | Number of questionnaires returned | 105 | 100% |
| Number of questionnaires retained | 0 | 0% | |
| Number of questionnaires administered | 105 | 100% | |
| Group 2—First cohort. Second stage survey | Number of questionnaires returned | 20 | 46.5% |
| Number of questionnaires retained | 23 | 53.4 | |
| Number of questionnaires administered | 43 | 100% | |
| Group 2—Second cohort. Second stage survey | Number of questionnaires returned | 16 | 51.6% |
| Number of questionnaires retained | 15 | 48.3 | |
| Number of questionnaires administered | 31 | 100% | |
| Total number of questionnaires administered | 189 (105 + 43 + 31) | 100% | |