| CENTRAL | Cochrane Central Register of Controlled Trials |
| GH | Growth hormone |
| IGF-1 | Insulin-like growth factor 1 |
| MeSH | Medical Subject Headings |
| NHLBI | National Heart, Lung, and Blood Institute |
| PitNET | Pituitary neuroendocrine tumour |
| PRISMA | Preferred Reporting Items for Systematic Reviews and Meta-Analyses |
| PROSPERO | International Prospective Register of Systematic Reviews |
| VHL | Virtual Health Library |
| WHO | World Health Organization |
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