Serious adverse events (SAEs) occurring after surgery during the study period
| System (n subjects) | Event | N events | Timing of SAE start (Days postprocedure) |
| Infections (n=5) | Sepsis | 2 | 22, 241 |
| Gastroenteritis | 1 | 108 | |
| Lower respiratory tract infection | 1 | 2 | |
| Urinary tract infection | 1 | 118 | |
| Viral infection | 1 | 234 | |
| Central nervous system (n=5) | Headache | 2 | 214, 1 |
| Carotid stenosis | 1 | 0 | |
| Hypertonia | 1 | 1 | |
| Ischaemic Stroke | 1 | 1 | |
| Partial seizure | 1 | 22 | |
| Gastrointestinal (n=1) | Vomiting | 1 | 2 |
| Procedural (n=1) | Subdural haemorrhage | 1 | 25 |
| Immunological (n=1) | HLA positivity | 1 | 33 |
| Psychiatric (n=1) | Suicide | 1 | 342 |
| Respiratory (n=1) | Aspiration pneumonia | 1 | 120 |
HLA, signifies human leucocyte antigen.