Harefield Hospital, Harefield, Middlesex, United Kingdom
Duke University Medical Center, Durham, North Carolina, United States
Cleveland Clinic Foundation, Cleveland, Ohio, United States
Duke University Medical Center, Durham, North Carolina, United States
University of Florida, Gainesville, Florida, United States
University of Nebraska, Omaha, Nebraska, United States
Ankara University Medical School, Altındağ, Ankara, Turkey
Tufts New England Medical Center, Boston, Massachusetts, United States
University of Chicago, Chicago, Illinois, United States
Kansas City Cancer Center, Kansas City, Missouri, United States
The Cleveland Clinic Foundation, Cleveland, Ohio, United States
Stanford University Medical Center, Stanford, California, United States
Chrildren's Hospital of Orange County, Orange, California, United States
The University of Alabama Birmingham, Birmingham, Alabama, United States
The Children's Hospital, Denver, Colorado, United States
University of Colorado Hospital, Denver, Colorado, United States
Rhode Island Hospital, Providence, Rhode Island, United States
Morristown Memorial Hosp, Morristown, New Jersey, United States