| Study | Reason for exclusion |
|---|---|
| Bassiouny 1997 | No clinical outcomes given |
| Choukroun 1994 | No clinical outcomes given. Assessment limited to changes in pulmonary function |
| Cotton 1992 | Not assigned treatment by randomization |
| Grauaug 1994 | No clinical outcomes given |
| Rollins 1993 | Not assigned treatment by randomization |
| Sanghvi 1998 | Not assigned treatment by randomization |
| Sinha 2005 | Compares animal derived surfactant to protein containing synthetic surfactant |
| Stenson 1994 | Not assigned treatment by randomization |
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