共 19 条
- [1] Armitage P, 1987, Statistical methods in medical research, V2nd
- [2] BARBARO G, 1995, ITAL J GASTROENTEROL, V27, P175
- [4] Bennett J. E., 1990, Principles and practice of infectious diseases., P361
- [6] COMO JA, 1994, NEW ENGL J MED, V330, P263, DOI 10.1056/NEJM199401273300407
- [8] DESCHAMPS MMH, 1988, AM J GASTROENTEROL, V83, P20