Pooling of trials is not appropriate in the case of heterogeneity.
Bollen
C W
CW
Uiterwaal
C S P M
CS
van Vught
A J
AJ
D006612:High-Frequency Ventilation / Q000379:methods*; D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000628:therapy*; D015201:Meta-Analysis as Topic; D016032:Randomized Controlled Trials as Topic / Q000379:methods