B. Sheppard
发表
G. Hunt,
D. Gopal,
D. Stolpman,
2002,
Canadian journal of gastroenterology = Journal canadien de gastroenterologie.
J. Bonnar,
F. de Wolf,
T. Khong,
1986,
American journal of obstetrics and gynecology.
D. Faigel,
R. Sampliner,
D. Lieberman,
2001,
Gut.