Massachusetts General Hospital, Boston, Massachusetts, United States
UCSD Medical Center, San Diego, California, United States
University of Missouri, Columbia, Missouri, United States
Maricopa Medical Center, Phoenix, Arizona, United States
University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States
Cooper University Hospital, Camden, New Jersey, United States
San Francisco General Hospital, San Francisco, California, United States
University of Maryland Medical Center, Baltimore, Maryland, United States
University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States
University of Maryland School of Medicine, Baltimore, Maryland, United States