Characteristics of interviewees
| Characteristics | Number of interviewees |
|---|---|
| Male | 10 |
| Female | 19 |
| Role | |
| Research nurse | 9 |
| Principal investigator | 10 |
| Trial manager | 10 |
| Location | |
| London | 8 |
| Midlands | 8 |
| Northeast England | 3 |
| Southwest England | 3 |
| East of England | 5 |
| Scotland | 2 |
| Unit | |
| University/research organisation | 23 |
| GP practice site | 6 |