Study site (EDs)	Response rate, No. (%)
University of Texas Health Sciences at San Antonio	37/45 (82)
University of Illinois-Chicago Medical Center/Jesse Brown VA Medical Center	11/17 (65)
Memorial Hermann-Texas Medical Center/Lyndon B. Johnson General Hospital	51/59 (86)
West Virginia University Ruby Memorial Hospital	30/33 (91)
The George Washington University Hospital/The Prince George’s Hospital Center/Walter Reed National Military Medical Center/Washington VA Medical Center	38/95 (40)
Washington Hospital Center/Georgetown University	68/85 (80)
Stony Brook University Hospital	58/60 (96)
Naval Medical Center, Portsmouth, Virginia	49/65 (75)
Fairfax Hospital (pediatric ED)	8/15 (53)
Total	350/474 (74)

ED, emergency department.