| Study | Reason for exclusion |
|---|---|
| Abiramalatha 2019 | Wrong indication |
| Aguirre Corcoles 2003 | Wrong patient population |
| Anand 1987a | Wrong study design |
| Anand 1987b | Wrong comparator |
| Anand 1992 | Wrong intervention |
| Chiaretti 1997 | Wrong patient population |
| Chiaretti 2000 | Wrong patient population |
| ChiCTR‐IPR‐15006112 | Wrong indication |
| Dake 1997 | Wrong intervention |
| Gruber 2001 | Wrong indication |
| Karl 2012 | Wrong patient population |
| Kururattapun 1986 | Wrong patient population |
| McEwan 2000 | Wrong patient population |
| Michel 1995 | Wrong patient population |
| NCT01094522 | Wrong study design |
| Pan 2021 | Wrong patient population |
| Waterworth 1974 | Wrong patient population |
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