共 15 条
[12]
SPILKER B, 1991, GUIDE CLIN TRIALS, P150
[13]
WRIGHT L, 1994, NEW YORKER 0725, V25, P46
[14]
1994, ANN INTERN MED, V121, P8984
[15]
1993, MMWR-MORBID MORTAL W, V42, P12