“No positive” and “negative” results: Why do they count?
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https://doi.org/10.19230/jonnpr.1429Keywords:
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Smith GCS, Pell JP. Parachute use to prevent death and major trauma related to gravitational challenge: systematic review of randomised controlled trials. BMJ 2003;327;1459-1461. doi:10.1136/bmj.327.7429.1459
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