American society for gastrointestinal endoscopy postgraduate course
2021 ◽
Vol 14
(2)
◽
pp. 132-138
1987 ◽
Vol 9
(2)
◽
pp. 247
2012 ◽
Vol 75
(4)
◽
pp. AB432-AB434
◽
1986 ◽
Vol 8
(4)
◽
pp. 500
1983 ◽
Vol 29
(1)
◽
pp. 51-53
◽
2018 ◽
Vol 87
(4)
◽
pp. 952-955
◽