"Prone Positioning in Severe Acute Respiratory Distress Syndrome"
NEJM Jun 6
http://www.nejm.org/doi/full/10.1056/NEJMoa1214103
"CONCLUSIONS

In patients with severe ARDS, early application of prolonged prone-positioning sessions significantly decreased 28-day and 90-day mortality. (Funded by the Programme Hospitalier de Recherche Clinique National 2006 and 2010 of the French Ministry of Health; PROSEVA ClinicalTrials.gov number, NCT00527813.)"