TY  - GEN
AU  - Byar,D P
AU  - Freedman,L S
TI  - The importance and nature of cancer prevention trials
SN  - 0093-7754
PY  - 1990///0914
KW  - Clinical Trials as Topic
KW  - Humans
KW  - Neoplasms
KW  - epidemiology
KW  - Patient Compliance
KW  - Research Design
N1  - Publication Type: Journal Article; Review
ER  -