TY  - BOOK
AU  - HULLEY, S .
AU  - CUMMINGS, S  .
TI  - DESIGNING CLINICAL RESEARCH / 
SN  - 9780781782104
U1  - 610.72 
PY  - 2007///
CY  - NULL : 
PB  - LWW, WOLTERS, KLUWER , 
KW  - PSM
ER  -