共 18 条
[11]
MILLER DS, 1974, LANCET, V2, P691
[12]
INCIDENCE OF ULCERATIVE-COLITIS IN THE CARDIFF REGION 1968-1977
[J].
GUT,
1984, 25 (08)
:846-848
[14]
NORDENVALL B, 1982, DEUT MED WOCHENSCHR, V107, P1900
[16]
1974, CURRENT POPULATION P, V25
[17]
1977, MORTALITY STATISTICS
[18]
1952, REGISTRAR GENERALS S