Study	Reason for exclusion
Christofori 2011	This trial was conducted in women from 34 to 36 weeks of gestation.
Issa 2019	Comparison between two different corticosteroids
Jain 2005	This trial was terminated due to slow enrolment and lack of funding.
Koch 2016	Ineligible comparator: gestational ages are different in the two groups
Ontela 2018	Ineligible population: women not at term
Sananes 2017	Comparison groups are of different gestational age.