TY  - BOOK
AU  - Vittinghoff, Eric  .
TI  - Regression methods in biostatistics: linear, logistic, survival, and repeated measures models / 
SN  - 0-387-20275-7
U1  - B28ObG 
PY  - 2005///
CY  - New York : 
PB  - Springer-Verlag , 
KW  - Regression analysis
ER  -