Hernesniemi 1979.

Methods	Random allocation using sealed opaque envelopes. Double blind.
Participants	Age 15 or above with severe closed brain injury. Five exclusions; three not head injury, one 14 years old, one imminent death.
Interventions	Betamethasone 100mg IV on admission, then 80mg/day IV for 7 days, then tapering off over further 7 days. Placebo.
Outcomes	Glasgow Outcome Scale at 6 or 12 months. Complications.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	Adequate