TY  - BOOK
AU  - Schulz, Kenneth F.
AU  - Grimes, David A.
TI  - The lancet: handbook of essential concepts in clinical research 
SN  - 0080450377
U1  - 616.007 SCH 
PY  - 2006///
CY  - Edinburgh
PB  - Elsevier
KW  - Randomised controlled trials
N1  - Includes bibliographical references and index
ER  -