TY  - BOOK
AU  - Elwood, J. Mark
TI  - Critical appraisal of epidemiological studies and clinical trials
SN  - 0192627449
PY  - 1998///
CY  - Oxford
PB  - Oxford University Press
KW  - ClinicalTrials
KW  - Epidemiologic Methods
KW  - Epidemiology
ER  -