共 17 条
[1]
BELBER JP, 1971, GASTROENTEROLOGY, V61, P55
[2]
CAMERON AJ, 1977, MAYO CLIN PROC, V52, P806
[3]
COTTON PB, 1973, BRIT MED J, P569
[5]
DRONFIELD MW, 1977, LANCET, V1, P1167
[6]
HEDEMAND N, 1977, GASTROINTEST RADIOL, V1, P331
[9]
KATON RM, 1973, GASTROENTEROLOGY, V65, P728