| Study | Reason for exclusion |
|---|---|
| Chu 1967 | Utilized ineffective surfactant prepartion (DPPC alone) and ineffective mode of delivery |
| Milner 1984 | Reports respiratory compliance only |
| Morley 1981 | Treatment allocation not random |
| Morley 1988 | Infants less than 30 weeks gestation included in Ten Centre Study |
| Morley 1991 | Reports respiratory compliance only |
| Robillard 1964 | Utilized ineffective surfactant preparation (DPPC alone) and ineffective mode of delivery |
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