Table 1.
Study type.
| Non-human | 87 |
| Human | 73 |
| Animal experiment | 35 |
| Animal tissue | 17 |
| Animal model | 15 |
| Case report | 13 |
| In vitro study | 13 |
| Animal cell | 6 |
| Human cell | 5 |
| In vivo study | 3 |
| Interview | 2 |
| Phase 2 clinical trial (topic) | 2 |
| Qualitative research | 2 |
| Questionnaire | 2 |
| Clinical article | 1 |
| Evidence-based medicine | 1 |
| Experimental model | 1 |
| Normal human | 1 |
| Phase 1 clinical trial (topic) | 1 |
| Phase 3 clinical trial (topic) | 1 |
| Phase 4 clinical trial (topic) | 1 |
| Semi-structured interview | 1 |
| Structured interview | 1 |
| Structured questionnaire | 1 |