Glen A. Lehman Frank Troiano Gastrointestinal Endoscopy 35 (1989) 360-361. doi:10.1016/S0016-5107(89)72829-7 journal Gastrointestinal Endoscopy Copyright © 1989 American Society for Gastrointestinal Endoscopy Published by Mosby, Inc. All rights reserved. Mosby, Inc. 0016-5107 35 4 1989 1989 360-361 360 361 10.1016/S0016-5107(89)72829-7 http://dx.doi.org/10.1016/S0016-5107(89)72829-7 doi:10.1016/S0016-5107(89)72829-7
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