This study was performed at a single tertiary care center, which may cause sampling bias.
This study was performed at Mayo Clinic, Rochester, MN, in years 2007 2009.
This study was performed at two institutions, and our findings may not be generalizable to other EDs across the nation.
This study was performed at the experimental farm of the College of Food and Agriculture Sciences, King Saud University, Riyadh.
This study was performed at two institutions, and our findings may not be generalizable to other EDs across the nation. .
This study was performed at the Haga Hospital and regional EMS organisations in The Hague, The Netherlands.
This study was performed at the Department of Emergency and Trauma in a tertiary care teaching hospital from January 2011 until July 2011.
This study was performed at an academic medical institution with a four-year EM residency program that is combined between two main hospital sites.
This study was performed at a hospital with a non-specialized trauma service with the healthcare level of basic trauma and reconstructive surgery.
This study was performed at an Association for the Assessment and Accreditation of Laboratory Animal Care International-accredited large animal research facility.
This study was performed at a 30-ha dairy farm in Guettingen, Switzerland, with about 60 dairy cows, one bull and ten calves.
