Los Angeles County & USC Medical Center, Los Angeles, California, United States
University of Arizona Department of Surgery, Tucson, Arizona, United States
University of Maryland, Baltimore, Maryland, United States
University of Florida, Shands Emergency Department, Gainesville, Florida, United States
The University of Cincinnati Health, Cincinnati, Ohio, United States
The University of Iowa, Iowa City, Iowa, United States
Saint Louis University, Saint Louis, Missouri, United States
Tampa General Hospital - University of South Florida, Tampa, Florida, United States