共 9 条
[5]
1987, MMWR-MORBID MORTAL W, V36, P225
[6]
1988, MMWR-MORBID MORTAL W, V37, P181
[7]
1987, MMWR-MORBID MORTAL W, V36, P235
[8]
1991, NEW ENGL J MED, V325, P73
[9]
1991, REPORT COMMITTEE INF