共 8 条
[1]
BIELORY L, 1995, ANN ALLERG ASTHMA IM, V74, P265
[2]
CLOSE P, 1995, PEDIATRICS, V95, P896
[4]
Jones B., 1989, DESIGN ANAL CROSS OV
[7]
PROPERTIES OF THE URN RANDOMIZATION IN CLINICAL-TRIALS
[J].
CONTROLLED CLINICAL TRIALS,
1988, 9 (04)
:345-364