共 46 条
[2]
ASHCROFT JJ, 1985, J ROY SOC MED, V78, P43
[3]
Barton S, 1982, Va Med, V109, P744
[5]
BURNETT CB, 1990, DISS ABSTR INT A, V51, P662
[9]
DOOLITTLE S, 1987, AM J PUBLIC HEALTH, V77, P874