共 21 条
[1]
Abell T, 2007, AM J GASTROENTEROL, V102, P1
[2]
[Anonymous], PHYS DIR
[4]
Census 2000 Data for the United States, CENS 2000 DAT US
[9]
Hoogerwerf WA, 1999, AM J GASTROENTEROL, V94, P1029