Study	Reason for exclusion
Durand 1987	Respiratory distress syndrome was not listed as inclusion criterion
Graff 1985	Not a controlled study
Green 1981	Retrospective study
Greenough 1985	Enrollment criteria included infants less than 10 days of age
Hegyi 1986	Respiratory distress syndrome was not listed as inclusion criterion
Laubscher 1998	Respiratory distress syndrome was not listed as inclusion criterion
Moylan 1975	Not a randomized study
Tulassay 1986	Not a randomized study
Yeh 1985	No assessment of any of the major outcome variables selected for this systematic review
Zanardo 1995	Enrollment criteria included either apnea or respiratory distress syndrome