共 32 条
[1]
ALLAN R, 1976, Q J MED, V45, P533
[4]
BORLAND JL, 1967, GASTROENTEROLOGY, V52, P631
[5]
Breslow N, 1980, STATISTICAL METHODS, V32
[8]
COLEMAN M, 1986, INT J EPIDEMIOL, V13, P134
[9]
COX DR, 1972, J R STAT SOC B, V34, P187