AU  - Hulley,Stephen B.
AU  - Cummings, Steven R.
AU  - Browner, Warren S.
AU  - Grady, Deborah G.
AU  - Newman, Thomas B.
TI  - Designing Clinical Research
SN  - 1608318044
U1  - 614.4072 
PY  - 2013///
CY  - Philadelphia
PB  - Wolters Kluwer
KW  - Epidemiologic Methods
KW  - Research Design
N1  - Include index
ER  -