1. Department of Radiation Oncology; University of Oklahoma Health Sciences Center; Oklahoma OK
2. Rhode Island Hospital; Providence, RI
3. Wellstar Kennestone Hospital; Marietta GA
4. Beth Israel Medical Center; New York NY
5. White Plains Hospital; Dickstein Cancer Center; White Plains NY
6. Maryland Regional Cancer Center; Silver Spring MD
7. Rush University Medical Center; Chicago IL
8. Enloe Medical Center; Chico CA USA