TY  - BOOK
AU  - Vittinghoff, Eric .. [et.al.]
TI  - Regression methods in biostatistics: linear, logistic, survival and repeated measures models
T2  - Statistics for biology and health
SN  - 0387202757
U1  - 610.727 
PY  - 2004///
CY  - New York
PB  - Springer
ER  -