| 1 | http://www.cancer.gov/clinicaltrials/search |
| 2 | http://www.cancer.gov/cancertopics/types/bone |
| 3 | http://www.cancer.gov/clinicaltrials/ft-more-than-one-type |
| 4 | http://www.cancer.gov/clinicaltrials/ft-supportive-care |
| 5 | http://www.cancer.gov/clinicaltrials/ft-NCI-02-C-0052-DCsubstudy |
| 6 | http://www.cancer.gov/clinicaltrials/ft-NCI-02-C-0052 |
| 7 | http://www.cancer.gov/clinicaltrials/ft-NCI-78-C-0039 |