共 27 条
- [21] REID JA, 1988, LANCET, V2, P321
- [22] *ROYAL AUSTR COLL, 1995, INCL PROC AN INT COM
- [24] *VICT HLTH DEP, 1991, REP OUTBR GASTR DUE
- [25] WHITE KE, 1986, AM J EPIDEMIOL, V124, P120, DOI 10.1093/oxfordjournals.aje.a114356
- [26] 1996, COMMUNICABLE DIS INT, V20, P326
- [27] 1991, CDI, V15, P292