Results summary table
| Variable | Number (%) |
| Total number of included papers | 445 (100) |
| Total number of transplants reported | 85 477 |
| Median number of transplants per paper (range) | 72 (1–20524) |
| Number of papers that explicitly stated organs (hearts, livers, lungs) were from deceased sources | 173 (39) |
| Number of papers reporting research ethics approval | 324 (73) |
| Number of papers with any information on the identity of the sources of organs | 63 (14) |
| Number of papers with explicit statement that no organs from prisoners were used | 33 (7) |
| Number of papers that reported consent for donation | 6 (1) |
| Number of papers with any statement about the diagnosis of death in sources (after brain death, after cardiac death) | 64 (14) |