The classic article that stirred the pot regarding prehospital ETI.
RCT. BVM on odd days and ETI on even days
No diference in survival or in neurologic outcome.
Where it stirred the pot was in that roughly 50% of cases the paramedics could not intubate these patients. They specuate due to overall young age of patients and maybe the skill dilution in such large systems. So, good BVM skills are very useful for all.