Multicenter cluster-crossover randomized<unk>  including 27 EMS agencies associated with US sites of the Resuscitation Outcomes Consortium
The 27 EMS agencies were grouped into 13 randomization clusters
Each cluster selected a crossover interval of 3-5 months
Crossover dates and assigned interventions planned by lead statistician to achieve balance across sites
PART trial
PROCAMIO Trial
FALLS protocol
STOPP/START criteria
ACS - Risk Stratification
Denver screening criteria
ACEP clinical policies
Clinical decision rules list