“Parachute use to prevent death and major trauma related to gravitational challenge: systematic review of randomised controlled trials“
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC300808/
“Parachute use to prevent death and major trauma related to gravitational challenge: systematic review of randomised controlled trials“
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC300808/