TY  - BOOK
AU  - Elwood,M
TI  - Critical appraisal of epidemiological studies and clinical trials
SN  - 9780198529552
PY  - 2007///
CY  - Oxford
PB  -  Oxford University Press, 
KW  - Epidemiology
KW  - Epidemiologic methods
KW  - Clinical trials
KW  - Evidence based practice
KW  - Critical appraisal
ER  -