Northwestern, Chicago, Illinois, United States
Grant Medical Center, Columbus, Ohio, United States
Flaget Memorial Hospital, Bardstown, Kentucky, United States
Saint Joseph London, London, Kentucky, United States
University of Michigan, Ann Arbor, Michigan, United States
ECOG-ACRIN Cancer Research Group, Philadelphia, Pennsylvania, United States
Eastern Cooperative Oncology Group, Boston, Massachusetts, United States
Veterans Adminstration New Jersey Health Care System, East Orange, New Jersey, United States